Question

the dimension of a room are 8m, 6m, and 5m find the cost of distempring its four walls at the rate of rupees 80 per sq metre.

Answer 1

Here is your solutions

Given :-

The dimension of a room are 8m(length), 6m(breadth), and 5m(height).

To find the cost of distempring its four walls at the rate of rupees 80 per sq metre :-

We know that

Area of 4 wall = 2 × (l+b) × h

=> 2 × (8+6) × 5

=>2 × 14×5

=>140 m^2

Hence

The rate of rupees 80 per sq metre. = 140 ×80

Total cost = Rs 11200

Hope it helps you

Answer 2

As we know that,

Area of four wall = 2h( l + b )
= 2 × 5 ( 8 + 6 )
= 10 × 14
= 140 m²

Cost of 1 m² = ₹ 80
Cost of 140 m² = ₹ 11200