Question

A swimming pool is 20m in length,15m in breadth and 14m in depth.Find the cost of cementing its floor and wall at the rate of Rs.12 per Square metre

Answer 1

20*15 +  2*14[20+15]
300+980
1280 m*m

cost = 12*1280
15360

Answer 2

T. S. A. Of rectangle =2(lb+bh+hl)
T.S.A.of pool=2(bh+hl)lb
=2(15*14+14*20)20*15
=2(210+280)300
=2(490*300)
=2(38000)
=76000
Cost of cementing =12*76000
=₹912,000