Question

A wrist watch which is running 12 minutes late
on a Sunday noon is 16 minutes ahead of the
correct time at 12 noon on the next Sunday.
When is the clock 8 minutes ahead of time?​

Answer 1

Answer:

Given : On a Sunday noon, The wrist watch is running 12 minutes late i.e Actual time - 12 minutes.

On the next Sunday, the wrist watch is running 16 minutes ahead i.e Actual time + 16 minutes.

So, the watch has been pacing up during the week and has made a difference of (Actual time + 16 minutes) - (Actual time - 12 minutes) = 28 minutes, across the week.

Hence, in one day it gains no. of minutes = (28 minutes)/(7 Days) = 4 minutes/Day.

Now, to make the clock run 8 minutes ahead i.e Actual time + 8 minutes, the difference it should make = (Actual time + 8 minutes) - (Actual time - 12 minutes) = 20 minutes. 

To make up this difference of 20 minutes, it would take = (20 minutes)/(4 minutes/Day) = 5 Days.

So, from Sunday noon, it would take exactly 5 days to get the clock run 8 minutes ahead of time. 

Hence, Sunday noon + 5 days = Friday noon.

Thus, the correct option is B Friday noon.

Explanation:

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Answer 2

Answer:

Friday noon

Explanation:

first we have to find out correct time

so late time

----------------. ×total hours

late time + fast time

12

-------- ×168. =72 hrs

12+16

means we add 72 hrs in Sunday noon .

we get Wednesday noon. correct time .

As we know that clock gain = 12+16=28 minutes in 7days

so in one day it will gain 28/7 =4 mnts per day

so 8 minutes will gain in 2 days

add these two days in correct time days = Wednesday +2 days = Friday noon . is correct answer