Question

A was is 15 m long, 10 m broad and 4 m height . Find the cost of cementing its walls and ceiling at the rate of 0.50 per square metre​

Answer 1

Answer:

Area of floor + Area of ceiling =Area of four walls

 ⇒lb+lb=2×h×(l+b), where l, b, h are the length breadth and height of the hall

 ⇒lb=h×(l+b)

⇒15m×12m=h×(15m+12m)

⇒h=2715×12m=320m

∴ Volume of the hall =l×b×h=15m×12m×320m=1200m3

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Answer 2

Answer:

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