Significant Figures in Product

Q.

How to calculate the radius of a cylinder?

Q.

A well of diameter $4m$ is dug $14m$ deep. The earth taken out is spread evenly all around the well to form a $40cm$ high embankment. Find the width of the embankment.

Q.

A rectangular piece of paper $11cm\times 4cm$ is folded without overlapping to make a cylinder of height $4cm$ .find the volume of the cylinder?

Q. The length, breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct significant figures.

Q. The length and the breadth of a rectangular sheet are $16.2\text{cm}$ and $10.1\text{cm}$ respectively. The area of the sheet in appropriate significant figures is

1. $164{\text{cm}}^2$
2. $163{\text{cm}}^2$
3. $163.6{\text{cm}}^2$
4. $163.62{\text{cm}}^2$

Q. If a body travels a distance of $97.52\text{m}$ along a straight line in $2.54\text{s}$, then its speed in appropriate significant figures is

1. $38.4\text{m/s}$
2. $38.3937\text{m/s}$
3. $38.394\text{m/s}$
4. $38.39\text{m/s}$

Q.

Find the volume of a cylinder. Round your answer to the nearest tenth

Q.

A cylindrical tube open at both ends is made of iron sheet which is 2 cm thick. If the outer diameter is 16 cm and its length is 100 cm then find how many cubic centimeters of iron has been used in making the tube?

Q. A thin cylindrical wire has a length of $21.7\text{cm}$ and radius of $0.46\text{mm}$. The volume of the thin wire to the correct significant figures is

1. $0.1{\text{cm}}^3$
2. $0.14{\text{cm}}^3$
3. $0.144{\text{cm}}^3$
4. $0.1443{\text{cm}}^3$

Q.

What is the exact volume of the cylinder?

1. $18\mathrm{\pi }{\text{in}}^3$

2. $36\mathrm{\pi }{\text{in}}^3$

3. $54\mathrm{\pi }{\text{in}}^3$

4. $63\mathrm{\pi }{\text{in}}^3$

Q. The mass and volume of a body are $4.237\text{g}$ and $2.5{\text{cm}}^3$ respectively. The density of the material of the body in correct significant figures is

1. $1.6948{\text{g/cm}}^3$
2. $1.69{\text{g/cm}}^3$
3. $1.7{\text{g/cm}}^3$
4. $1.695{\text{g/cm}}^3$

Q. Number of significant figures in average speed if the distance covered is 10.01 m in time 5.022 s, is

यदि समय 5.022 s में तय की गई दूरी 10.01 m है, तब औसत चाल में सार्थक अंकों की संख्या है

1. One
   
   एक
2. Three
   
   तीन
3. Four
   
   चार
4. Two
   
   दो

Q.

One hectare is equal to

1. $10m^2$

2. $100m^2$

3. $10000m^2$

4. $1000m^2$

Q.

Find the volume of a cylinder . Round your answer to the nearest tenth.

Q. A thin cylindrical wire has a length of $21.7\text{cm}$ and radius of $0.46\text{mm}$. The volume of the thin wire to the correct significant figures is

1. $0.1{\text{cm}}^3$
2. $0.14{\text{cm}}^3$
3. $0.144{\text{cm}}^3$
4. $0.1443{\text{cm}}^3$

Q. If a body travels a distance of $97.52\text{m}$ along a straight line in $2.54\text{s}$, then its speed in appropriate significant figures is

1. $38.4\text{m/s}$
2. $38.3937\text{m/s}$
3. $38.394\text{m/s}$
4. $38.39\text{m/s}$

Q. In a particular system, the unit of length, mass and time are chosen to be $10\text{cm}$, $10\text{gm}$ and $0.1\text{s}$ respectively. The unit of force in this system will be equivalent to

1. $1/10\text{N}$
2. $1\text{N}$
3. $10\text{N}$
4. $100\text{N}$

Q. The length and the breadth of a rectangular sheet are $16.2\text{cm}$ and $10.1\text{cm}$ respectively. The area of the sheet in appropriate significant figures is

1. $164{\text{cm}}^2$
2. $163{\text{cm}}^2$
3. $163.6{\text{cm}}^2$
4. $163.62{\text{cm}}^2$

Q.

A cylindrical tube opened at both the ends is made of iron sheet which is$2cm$ thick. If the outer diameter is$16cm$ and its length is $100cm$, find how many $cubiccentimeters$ of iron has been used in making the tube?

Q. The Circular scale of a screw gauge has 80 equal divisions, and its pitch is 2 mm. The least count of screw gauge is

1. 0.01 mm
2. 0.25 mm
3. 0.04 mm
4. 0.025 mm

Q. In a particular system, the unit of length, mass and time are chosen to be $10\text{cm}$, $10\text{gm}$ and $0.1\text{s}$ respectively. The unit of force in this system will be equivalent to

1. $1/10\text{N}$
2. $1\text{N}$
3. $10\text{N}$
4. $100\text{N}$

Q. The length and the breadth of a rectangular sheet are $16.2\text{cm}$ and $10.1\text{cm}$ respectively. The area of the sheet in appropriate significant figures is

1. $164{\text{cm}}^2$
2. $163{\text{cm}}^2$
3. $163.6{\text{cm}}^2$
4. $163.62{\text{cm}}^2$

Q.

Find the volume of a cylinder at the left. Round your answer to the nearest tenth.

Q.

The height $h$ and the base area $B$ of a cylinder is given. Find the volume of the cylinder. Write your answer in terms of $\mathrm{\pi }$ if

$$\begin{gathered} \mathrm{h}=5\mathrm{units} \\ B=4\mathrm{\pi }\mathrm{square}\mathrm{units} \end{gathered}$$

Q. In a particular system, the unit of length, mass and time are chosen to be $10\text{cm}$, $10\text{gm}$ and $0.1\text{s}$ respectively. The unit of force in this system will be equivalent to

1. $1/10\text{N}$
2. $1\text{N}$
3. $10\text{N}$
4. $100\text{N}$

Q. If a bucket of paint of 4.28 litres covers wall area of 48.0 $m^2,$ what is the thickness of layer of paint on the wall?

1. $8.9\times {10}^{-2}$ mm
2. $8.90\times {10}^{-2}$ mm
3. $9\times {10}^{-2}$ mm
4. None

Q. If a bucket of paint of 4.28 litres covers wall area of 48.0 $m^2,$ what is the thickness of layer of paint on the wall?

1. $8.9\times {10}^{-2}$ mm
2. $8.90\times {10}^{-2}$ mm
3. $9\times {10}^{-2}$ mm
4. None

Q. Given a = 2.45 , b = 3.2 and c = 5.845, then value of $(a\times b)+c$ according to correct significant figure rule is

Q.

Express the following as a rule for each geometrical figure.

The volume of a cylinder $\left(V\right)$ is equal to$\pi$ times the square of the radius $\left(r\right)$ times the height $\left(h\right)$ of the cylinder .

Q. If $97.52$ is divided by $2.54$, the correct result in terms of significant figures is

1. $38.4$
2. $38.3937$
3. $38.394$
4. $38.39$