Question

A room is 5.5 m long, 4 m wide and 3.5 m high. Find the cost of papering its walls with paper 90 cm wide at Rs 1.20 per mere.

Answer 1

Heya mate!!

we know that area of four walls= 2(l+b)h
= 2(5.5+4)3.5
= 2 X 9.5 X 3.5
= 2 X 33.25
= 66.5 sq. m
length of paper required= area/ width
= 66.5/0.9
= 73.88m

Now, cost= length of the paper X rate
=73.88 X 1.2
= 88.65 rs....

hope it helps!!

Answer 2

Ok hre is the ans

Two walls at 5.5x3.5, or 2(19.25), or 38.50 m2.

Two walls at 4x3.5, or 2(14), or 28 m2.

The room has 66.50 m2 of wall space.

The amount of paper needed is 66.50 / 0.9 (90 cm = 0.9 m)

66.50 / 0.9 = 73.8888

The cost of the paper is 1.20 · 73.89.

The cost of the paper is Rs 88.67.

Ik