Question

a rectangular room is 10m long, 6m wide and 5m high. it has two doors 1.5m by 2m each and two windows 2m by 1.8m each. find the cost of white washing the walls and ceiling of the room at the rate ₹50 per m square

Answer 1

TSA of cuboide is =2(lh +bh+bl)
= 2×10×6 +2×6×5 +2×5×10
= 120+60+100
= 280 m square
area of wall and sealing = 280 - 60
= 220 m square
area of door and windows = (1.5 ×2)+(1.8×2)
=3 + 3.6
=6.6 m square
area of wall and sealing without door and windows
= 220-6.6
=213.4 m square
cost =213.4 × 50
= $106070 answer

(i didn't had rupees sign in my phone)

I hope this helps you☺

Answer 2

Your answer is
Rs.106070