Length

Q.

What does the odometer of an automobile measure?

Q.

How many light-years away is Mars from earth?

Q.

How will you measure the diameter of a ball?

Q.

Explain the term acceleration.

Q.

How far is the moon in light-years from earth?

Q.

Foot is used as a basic unit of measurement for measuring length in which of the following systems?

1. FPS System

2. SI System

3. American Standard of Measurements

4. Imperial System

Q.

In ancient times, people used 'angul' (finger), a mutthi (fist), length of human feet for measurements. Later on, these were not used for measurements.

1. True
2. False

Q.

The thickness of a dozen coins on a metre scale was found to be $18cm$. What is the thickness of one coin?

1. $15cm$

2. $1.2cm$

3. $1.8mm$

4. $15mm$

Q.

One kilometre is ____ times the length of one metre.

1. $100$

2. $1000$

3. $10$

4. $1/10$

Q. We take a one-metre rod and mark $4$ points on it such that each segment is of equal length.

If we take OA to be X units, then X units are equal to:

1. $2m$
2. $2000mm$
3. $20cm$
4. $2cm$

Q. A car travels a distance of $200km$ from Delhi to Ambala towards North in $5hours$. Calculate speed of the car for this journey.

Q. $\text{1 metre}$ can be defined as the distance travelled by light in in vacuum.

1. $\frac{1}{3\times {10}^6}s$
2. $\frac{1}{3\times {10}^8}s$
3. $\frac{1}{8\times {10}^3}s$

Q.

State whether true or false, and correct the statement if false:

The distance of the planets and stars from earth is measured in light years.

1. True
2. False

Q.

Which of the following units of distance was not used during ancient times?

1. Metre
2. Feet
3. Angul
4. Cubit

Q.

Find the breadth and perimeter of the rectangle of area $962c{m}^2$ and length $26cm.$

Q.

Which of the following are submultiples of a metre?

1. Centimetre

2. Kilometre

3. Millimetre

4. Lightyear

Q.

What does the odometer of an automobile measure?

Q. The thickness of a dozen coins on a metre scale was found to be $24cm$. What is the thickness of one coin (in $mm$)?

1. 20

Q.

The length of a foot can be used as a standard unit.

1. True

2. False

Q. What are speedometer and odometer? Describe.

Q.

A kilometre (km) is a (1)______of metre and a centimetre (cm) is a _______ of metre.

1. (1) Multiple

   (2) Submultiple

2. (1) Submultiple

   (2) Multiple

3. (1) Multiple

   (2) Multiple

4. (1) Submultiple

   (2) Submultiple

Q.

The length of a rod cannot be used as a unit of length.

1. True

2. False

Q. Ritu wants to measure her height. The unit of length that she can use conveniently is:

1. mm
2. cm
3. km
4. m

Q.

Which of the following were units of small distances in ancient India?

1. Angul

2. Mutthi

3. both a and b

4. none of the above

Q.

A $1m$ rod has $4$ points marked as given in the figure, If each segment is of equal measure, then what will be the measure of $X$?

1. 2000 mm

2. 2 m

3. 20 cm

4. All of these

Q.

Define uniform acceleration.

Q.

Express $80mm$ as $centimetres$ using decimals.

Q. $5m=$ _______ $cm$.

1. $5$
2. $50$
3. $500$
4. $0.5$

Q.

Convert : $4.9m$ into $mm$

Q. The length of a tube is $5800mm$. What would be its length when expressed in S.I. units?

1. 5.8