Question

a swimming pool is 40 m long, 25 m wide and 6 m deep. find the cost of cementing its floor and walls at the rate of ₹ 135 per square meter

Answer 1

cementing the wall =2*(40+25)*6
=780
cost of wall =780 *135
= 105300 m.square

cementing the floor =40*25
= 1000*135
= 135000 m.square

Answer 2

Area of its floor and walls = 2(l+ b)h + (lb)
= 2(40+25)6 + (40*25)
= 2(65)6 + 1000
= 780 + 1000
= 1780
cost of cementing = 1780*135
= 2,40,300 rupees