A rope makes 125 rounds of a cylinder with base radius 15 cm. How many times can it go round a cylinder with base radius 25 cm?
Let the required number of rounds be x.
More radius, less rounds (Inverse Proportion)
Radius in cm == Round
15 == 125
25 == x
⟹ x=(15 * 125)/25 = 75 rounds
Create a FREE account and get: