Question

cube shaped box of side 12 cm is to be painted how much will it cost to paint the outer surface of the box at the rate of 35 per square metre​

Answer 1

Area to be painted = Total surface area of Square

TSA of Square = 6 × (side)² = 6×(12)² = 864 m²

1 m² = Rs. 35

864 m² = Rs. (864*35) = Rs. 30,240

Answer 2

$\blue{\large\mathfrak{Solution}}$

Step by Step Explaination :–

Length of the side of the cube shaped box = 12cm

Converting 'cm' into 'm' :–

$= > \frac{12}{100}cm = 0.12m$

Formula of total surface area of the cube = 6a²

∴ Total surface area = 6(0.12)² = 6×0.0144

= 0.0864m²

A/q,

∴ Cost for painting the outer surface of the box at the rate of 35 per square metre = 35×0.0864 = ₹3.0240

$\blue{\large\mathfrak{Hope \: it \: helps \: you}}$