Question

one side of cube box is 0.5 m how much will it cost to paint the outer surface of the box at the rate of 40 per square metre

Answer 1

one side of the cube =0.5
surface area of cube =6a square
=6 x 0.5x0.5
= 6 x 25
" =105m square

1 square meter = 40
105 square meter = 4200

Answer 2

Answer:

Step-by-step explanation:

Concept:

The concept of area of the geometric figures will help us to solve this question.

Given:

The length of the one side of the cube box is $0.5 m$ and the rate per square to paint the box is Rs. $40/-$ .

To Find:

We have to find out the total cost to paint the outer surface of the box.

Solution:

The formula of the area of the cube box is $6 a^{2}$ .

$a$ means the side of the cube box.

The value of $a$ is $0.5 m$.

Put the value in the formula.

$6 a^{2}=6 \times (0.5)^{2}=1.5$ square metre.

The total area is $1.5$ square metre.

the rate per square to paint the box is Rs. $40/-$ .

We need to multiply the rate and the area of the cube box.

Total cost for painting the outer surface is $1.5 \times 40=60/-$

Therefore, the total cost is Rs. $60/-$ .

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