Question

A swimming pool is20 m in length,15m in breadth and 4 m in depth. Find the cost of cementing its floor and walls @$12 per m2

Answer 1

let l is length
b is breath and d is depth

swimming pool has 1 floor and 4 walls

1 floor's area = l × b

4 walls area = 2 ( l× d ) + 2 ( b × d )

so total area of swimming pools cementing area =

( l × b ) + 2 ( l × d ) + 2 ( b × d )

= ( 20 × 15 ) + 2 ( 20 × 4 ) + 2 ( 15 × 4 )

= 300 + 160 + 120

= 580 sq m

cost is 12$ per meter sq

so total cost = 580 × 12

= 6960 $