Question

Find the cost of papering the walls of a room 25 m long, 20 m broad, 15 m high with a paper 5 m wide at Rs 2 per metre​

Answer 1

Area of 4 walls = 2 (lb+ bh+ hl)+ lb

= 2 (25×20+ 20×15+15×25)+ 25×20

Divide the answer with 5

and then multiply with 2

You will get the answer

hope it helps you.

Answer 2

Answer:

the formula is 2 (lb×bh×hl)+lb

so,

2 (25×20+20×15+15×25)+25×20