Discussion Forum



1)

Three clocks -Ci, C2, and C3 show correct time at 3:00 a.m. Clock C1, uniformly loses 4.5 minutes in an hour, clock C2 uniformly loses 1.5 minutes in an hour and clock C3 uniformly gains 2.5 minutes in an hour. At 11:00 a.m on the same day, by how much time will C1 and C2' C2 and C3' C1 and C3 differ respectively?


A) 24 minutes, 32 minutes, 56 minutes

B) 25 minutes, 33 minutes, 56 minutes

C) 27 minutes, 40 minutes, 57 minutes

D) 29 minutes, 41 minutes, 58 minutes

Answer:

Option A

Explanation:

The time gap between 3:00 a.m. to 11:00 a.m. is 8 hours.
Ci loses 4.5 x 8 = 36 minutes in 8 hours. Hence it shows 10:24 a.m.
C2 loses 1.5 x 8 = 12 minutes in 8 hours.
Hence it shows 10:48 a.m.
The clock C3 gains 2.5x8 = 20 minutes in 8 hours.
Hence it shows 11:20 a.m.
Ci and C2 differ by 24 minutes.
C2 and C3 differ by 32 minutes and
Ci and C3 differ by 56 minutes.