Question

Question #d6e43

Answer 1

2.25 rounds

Explanation:

This question can be easily solved by applying unitary method.

No. of rounds made by the clock in 8 minutes = `1`

No. of rounds made by the clock in 1 minute = `1/8`
No. of rounds made by the clock in 18 minutes = `1/8` x `18` = 2.25

Answer 2

`color(purple)(2(1/4) rounds` or `color(purple)(2.25) rounds`

Explanation:

In 8 minutes -> 1 round

In 18 minutes -> (18/8) * 1 rounds

`=> 18/8 = (3 * 3 * cancel2) / (2 * 2 * cancel2) = 9/4 = 2 (1/4) rounds`

`=> 2 ((1* cancel(100)^25) / (cancel(4) * 100)) = 2 (25/100) = 2.25 rounds`