Question

A room is 8 m long, 6 m broad and 5.5 m heigh. It has one door of dimensions 2.5 m by 2 m and two windoews each of dimensions 1.5 mby 1 m.Find the cost of whitewashing the walls at ₹ 3.20 per sq. m.

Answer 1

Answer:

l=8m

B=6m

h=5.5m

1 door=2.5*2=5m

2 windows=1.5*1*2=3m

door+windows=5+3=8m

LSA=area of four walls=2(l+b)h

area of 4 walls=2(8+6)5.5

area of 4 walls =154m

excluding area of door and windows=

154-8=146m

cost of withering walls at 3.20/m sq.=

146*3.2=Rs .567.2

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