Question

A room is 12cm long,6cm broad and 3m high.it has two doors each measuring 2.5m*1.5m and 4 windows each measuring 1.5m*1.5m.find the cost of white washing its wall and roof at rate of Rs.6/sq.m

Answer 1

area of 4 walls=(2(l+b)h)
=(2(12+6)3)m square
=(6x18) m sq
=108m sq
area of two doors =2(2.5mx1.5m)
=7.5 m sq
area of 4 windows =4(1.5mx1.5m)
=9 m sq

area of white washing =(108-(7.5+9))m sq
=91.5m sq
cost of 1 m square white washing =6rupees
cost of 91.5m sq white washing =6x91. 5
=549 rupees

I hope this answer is correct

Answer 2

your answer refers to the attachment