Question

A Room is of 15m long ,10m wide and 8m deep Find the cost of inner surface colouring at Rs 2 per sq.m

Answer 1

Hope it will help u

See answer in attachment

Answer 2

Answer:

Given,

Cuboidal room of length, l = 15m

breadth, b = 10m

depth (height), h = 8m

To find :- Cost of colouring at ₹ 2/m²

Solution

Total Area for colouring = CSA + Area of Ceiling

= [2(l + b)h] + (l × b)

= [2(15 + 10)8] + 15 × 10

= 400 + 150

= 650 m²

Thus, cost of colouring = ₹ 650 × 2

= ₹ 1300