Question

A cylindrical candle has a volume of approximately 400cm^3 and is 8 cm tall. What is the radius of the candle?

Answer 1

Solution :-

We know that

V = πr²h

400 = 22/7 × r² × 8

400 × 7 = 22 × 7r²

2800 = 154r²

2800/154 = r²

18 ≈ r²

4.2 = r