9. A room is 40 m long, 30 m broad and
10 m high. Find the cost of whitewashing
its four wall and ceiling at 20 per sq m.
Answers
Answered by
5
Area to be white washed = 2 (by+hl) +lb
= 2(30×10+10×40) +40×30
= 2(300+400) +1200
= 2(700) +1200
=1400+1200
=
Cost of white wash of =
= Rs. 20
Cost if white wash of =
=
=Rs.130
Answered by
1
Step-by-step explanation:
Area to be white washed = 2 (by+hl) +lb
= 2(30×10+10×40) +40×30
= 2(300+400) +1200
= 2(700) +1200
=1400+1200
=
Cost of white wash of =
= Rs. 20
Cost if white wash of =
=
=Rs.130
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