Question

A room is 10m long ,and 6m wide and 4.2m high .It has one door of 2.5×1.5m and one window of dimension 1.5×1m find the cost of whitewashing the wall at ₹2.50 per sq.m. (answer should be ₹322.88)​

Answer 1

Step-by-step explanation:

we want unshaded part

so

ACEH + ABEF + CDGH + BDGF - window - door

6×4.2+ 4.2×10+ 4.2×10+ 6×4.2- 1.5×1 - 2.5×1.5

25.2+42+25.2+42-1.5-6.75

129.15sq.m

1sq.m=2.5rs

129.15m=xrs

then x=129.15×2.5 rs

x= 322.875 rs