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.

Step-by-step explanation:

Given : Diameter of round swimming pool = 59 ft

Radius = half of diameter

= $\dfrac{59}{2}$ ft

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

Area of bottom of pool = $\dfrac{22}{7}\times\dfrac{59}{2}\times\dfrac{59}{2}$

$=\dfrac{38291}{14}\ ft^2$

Each can of paint cover 300 ft².

So , Number of cans required to cover 1 ft² = $\dfrac1{300}$

Number of cans required to cover$\dfrac{38291}{14}\ ft^2$ = $\dfrac{38291}{14}\times\dfrac{1}{300}=9.1169047619\approx10$

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