Question

A room is 12 m long and 8 m broad and it contains 480 cu. metre of air. Find the cost of colouring it's walls at Rs 15 per square metre​

Answer 1

Answer:

₹10,200

Step-by-step explanation:

vol. of air = vol. of the room

=l*b*h=480

=12*8*h=480

=h=480/96

h=5m

now,

csa=2{lh+bh}

=2{12*5+8*5}

=680cm²

now, cost of colouring the walls ,

=15*csa

=₹15*680

=₹10,200

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