Clocks - Logical Reasoning (MCQ) Questions for Q. 28788

Q.  Rohit has a watch that gains 5 seconds in 3 minutes. It was set right at 9 a.m. in the morning.

In the afternoon of the same day, when the watch indicated 4 o'clock, how much time will the watch have gained?

- Published on 13 Apr 17

a. No change
b. 10 min
c. (11)2/3 min
d. 12 min

ANSWER: (11)2/3 min
 
Time from 9 a.m. to 4 p.m. = 7 hrs

The clock gains 5 secs in 3 min
In 60 min, it will gain, (60 x 5) / 3 = 100 sec

i.e. the clock gains 100 seconds in one hour
In 7 hours, it will gain 700 sec.

700/60 mins = (11)2/3 mins

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