Clock - Arithmetic Aptitude Questions and Answers

Home / Arithmetic Aptitude / Clock :: Discussion

A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct?

2 p.m. on Tuesday

2 p.m. on Wednesday

3 p.m. on Thursday

1 p.m. on Friday

Answer : Option B

Explanation :

Time from 12 p.m. on Monday to 2 p.m. on the following Monday = 7 days 2 hours = 170 hours.

The watch gains[2+4 $\frac { 4 } { 5 }$ ]min.or $\frac { 34 } { 5 }$ min. in 170 hrs

Now, $\frac { 34 } { 5 }$ min are gained in 170 hrs.

2 min. are gained in[170x $\frac { 5} { 34 }$ x2]hrs=50hrs

Watch is correct 2 days 2 hrs. after 12 p.m. on Monday i.e., it will be correct at 2 p.m. on Wednesday.

Be The First To Comment

Comments

Name