Two clocks start striking together at noon. The first clock strikes every 3 seconds and the second clock strikes every 2.5 seconds. Find the interval between the seventh strike of
A
11 seconds
B
8.5 seconds
C
6 seconds
D
8 seconds
Correct Option - D
Explaination
The clocks start striking at the zeroth second.
First strike - 0th second
Seventh strike of first clock
6*3 = 18 seconds
Fifth strike of second clock
4*2.5 = 10 seconds
Time interval
8 seconds