12 cm x 10 cm x 8 cm. S
4. A swimming pool is 15 m in length, 12 m in breadth and 2 m in depth. Find the cost of cementing
the floor and walls at the rate of 15 per sq. m.
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Swimming pool is of the form of cuboid
Area to be cemented= TSA- top area
= 2(lb +by +hl)- l×b
= 2(15×12+12×2+15×2)-15×2
=2(108+24+30)-30
=2(162)-30
=324-30
= 294m^2
Cost of cementing=294×15
= Rupees 5410
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