Aptitude - Clock - Discussion

Thank you everyone.

Here, the clock was late by 2 min. And then it gains 4 min 48 sec. Means we have to cover 2 min time as well as 4 min 4 sec time also.

Therefore total gain = 2 + 24/5 = 34/5 min in 7 days 2 hrs (170 hrs).

Here, extra 2 min of which we are a late need to be covered to make the time correct are gained in.

Therefore 34/5 min = 170.

1 min = 170 * (5/34),

2 min = 2 * 170 * (5/34),

2 min = 50 hrs.

i.e 2 days 2 hrs from Monday which is Wednesday 2 pm.

What will be the answer for the question?

A watch loses 5 seconds every 2 hours it is set on Wednesday at 10:00 am what time will it show the following Wednesday at 10:00 am?

Great explanation @Madhu.

Great explanations. Thank you all.

How it is 85/204?

Please anyone explain what is the meaning for this question?

A watch which "gains" uniformly is 2 minutes low at noon.

Since, gain word is used hence we will add on all the gains (i.e 2+4 min 48 sec = which turns on to be 24/5 min).

Total gain=> 2+24/5 = 34/5 min.

Hence, 34/5 mins are gained in 170 hrs (7*24+2).

Then, 2 mins will be gained in x hrs.

We get x hrs = 50 hrs (from cross multiplying above two equations).

Now, 2 mins are gained in 50 hrs which can be written as 2*24+2 (i.e 2 days and 2 hrs).

After Monday if we calculate 2 days and 2 hrs we get Wednesday and 2 hrs which is the answer to the question.

Cheers!

@ Rajesh.

Given that the said watch was 2 minutes low at Monday noon. Hence when it gained 2 minutes, The time was correct.

Please anybody explain me the gain and loose concept of the clock. I thought we should subtract 2 mins from 4 mins 4 sec. So we can calculate actual gain, so how we add both loss and gain of time >?