Finding Solution of an Equation by Trial and Error Method

Q.

$x=3$ is the solution of the equation $x+3=0$.

1. True

2. False

Q.

Find the length of the rectangle whose breadth is $10cm$ and perimeter is $50cm.$

Q.

The length of the side of a square with an area of 1600 m² is __ metres.

Q. Solve x + 8 = 20 by trial and error method.

1. 3
2. 12
3. 14
4. 28

Q.

Of all rectangles with a perimeter of $14$ which one has the maximum area? (Give the dimensions.) Let $A$ be the area of the rectangle. What is the objective function in terms of the width of the rectangle, $w$?

Q.

In figure 1, left-hand side (LHS) and the right-hand side (RHS) of the weighing machine are equal to each other. If we add 2 on the RHS, as shown in figure 2, what should we do to equalise LHS and RHS again?

1. Add 5 to RHS

2. Subtract 2 from LHS

3. Subtract 5 from RHS

4. Add 2 to the LHS

Q. Find the solution of the equation $x+2=6$ by trial and error method.

1. 5
2. 3
3. 2
4. 4

Q.

Find the perimeter of the rectangles whose length and breadth are given below:

length $75m$ and breadth $25m$

Q.

Solve the equation $\frac{1}{2}x+7=11$ by the trial and error method

Q. Find the solution for the equation $4y=20$ by trial and error method.

1. 2
2. 3
3. 4
4. 5

Q. Solve the following equation by Trial & Error Method.
$x+3=5$
[2 Marks]
[Trial and Error Method]

Q. If the value of $x$ is 4, then the value of $3x+4$ is.

1. 8
2. 12
3. 16

Q. What is the length and breadth of a rectangle if its perimeter is 12 cm and its length is 2 times its breadth?

1. 4 cm, 2 cm
2. 2 cm, 1 cm
3. 6 cm, 3 cm
4. 7 cm, 4 cm

Q.

Find the perimeter of the rectangle with length $36cm$and breadth $30cm$.

Q.

When equation is there 8x=24 then we have to do division by the L.H.S number

Q.

Find the breadth of the rectangle whose perimeter is $180cm$ and length is $58cm$.

Q. For which of the values of x, RHS = LHS for the given equation 5x - 10 = 0 ?

1. 0
2. 1
3. 2
4. 3

Q. Shila bought 15 chocolates and distributed them among x children. If each child got 5 chocolates, what's the number of children?

1. 1
2. 2
3. 3
4. 4

Q.

Find the perimeter of the rectangles whose lengths and breadths are given below,

Length $=$$\text{5 cm}$ , Breadth $=$ $\text{3 cm}$

Q. What is the length and breadth of a rectangle if its perimeter is 12 cm and its length is 2 times its breadth?

1. 4 cm, 2 cm
2. 2 cm, 1 cm
3. 6 cm, 3 cm
4. 7 cm, 4 cm

Q.

Find the breadth of the rectangle whose perimeter is $180cm$ and length is $51cm$.

Q. Multiply 69 and11 and find the sum of the result.

1. 23
2. 22
3. 21
4. 20

Q. Find the solution for the equation $4y=20$ by trial and error method.

1. 2
2. 3
3. 4
4. 5

Q.

If perimeter of a rectangle is $101\text{cm}$ and its breadth is $12.5\text{cm}$ , then its length is

1. $50.5\text{cm}$

2. $38\text{cm}$

3. $34.5\text{cm}$

4. $76\text{cm}$

Q.

Find the whole quantity if.

$12\%$of it is $₹1080$

Q.

Find the breadth of the rectangle whose perimeter is $180cm$ and length is $70cm$.

Q.

If the length of the rectangle is$35.5m$ and breadth is $5.5m$ less than its length, find its area.

Q. What is the length of the side of the square if area of the square is 9 $c{m}^2$?

1. $1cm$
2. $2cm$
3. $3cm$
4. $4cm$

Q. What's the value of x if x + 2 = 5?

1. 1
2. 2
3. 3
4. 4

Q. For the following algebraic equation 4x + y = 3, if we put x = 1 and y = 3 then LHS will be equal to RHS.

1. True
2. False