Question

A round swimming pool has a diameter of 59 ft, you want to paint the bottom of the pool. If each can of paint can cover 300 ft^2. How many cans do you need to buy?

Answer 1

Answer: You need to buy about 10 cans of paint.

Explanation:

Given : Diameter of round swimming pool = 59 ft

Radius = half of diameter

=
`(59)/(2)` ft

Area of circle =
`\pi r^2` , where r= radius

Area of bottom of pool =
`(22)/(7)*(59)/(2)*(59)/(2)`

`=(38291)/(14)\ ft^2`

Each can of paint cover 300 ft².

So , Number of cans required to cover 1 ft² =
`\frac1{300}`

Number of cans required to cover
`(38291)/(14)\ ft^2` =
`(38291)/(14)*(1)/(300)=9.1169047619\approx10`

Hence, you need to buy about 10 cans of paint.