A rectangular room is 6m long, 5m wide, and 3.5m high. It has two doors of size 1.1m by 2m and 3 windows of size 1.5 m by 1.4m .Find the cost of white washing the walls and the ceiling of the room at the rate of Rs.5.30 per square metre. Please answer fast .
Answers
Answered by
67
area of room = 6x5x3.5 = 105 square metre
area of 2 wall = 2(1.1x2) =4.40
area of 3 windows = 3(1.5*1.4)=6.30
total cost = {105 - (4.40+6.30)}x5.30 = 5,954.55
area of 2 wall = 2(1.1x2) =4.40
area of 3 windows = 3(1.5*1.4)=6.30
total cost = {105 - (4.40+6.30)}x5.30 = 5,954.55
Answered by
38
By formula
TSA- 2(lb+bh+hl)
Area of whitewashing = 2(6×3.5+5×2×3.5+6×5)-1.1×2×2 - 1.5×1.4×3
=96.3
1cm^2 = 5.3
96.3 cm^2
= 5.3×96.3
= 510.39
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