Question

One side of a cubic box is 0.8 m. How much will it cost to paint the outer surface of the box at the rate of ₹25 per sqm? ​

Answer 1

Answer:

Your answer is Rs.96

Step-by-step explanation:

We know that surface area of the cube = 6a²

so , given that a = 0.8

now,

= 6 (0.8)(0.8)

= 6 x 0.64

= 3.84 m²

cost for painting = 25 x 3.84

                           = rs.96

Your answer is Rs.96

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Answer 2

${\huge{\star{\underbrace{\tt{\red{Answer}}}}}}{\huge{\star}}$

Given :

• Side of cube = 0.8m
• Rate of paint = ₹25 per m²

To find :

• Cost of paint on the outer surface of box

Solution :

${\boxed{\sf \star \ Total \ surface \ area \ of \ cube \ = \ 6{a}^{2} }}$

here,

• a is side of cube

${\implies}$TSA = 6 × 0.8²

${\implies}$TSA = 6 × 0.64

${\implies}$ TSA = 3.84 m²

Now ,

Total cost of painting = 25 × 3.84

Total cost of painting = ₹ 96

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