Aptitude - Exact Time

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Exact Time

A clock was set right at 5 am then it loses 16 minutes every day, on the 4th day when it shows 10 am, what is the exact time.

Total Answers and Comments: 10

Last Update: October 29, 2009 Asked by: khansanarehan

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Submitted by: saurabhgupta1389

assume that x minutes have passed since 5:00 clock on the 4th day when clock shows 10:00

at the begining of 4th day 48 min have been lost(as wexplained in previous posts)
so at 5 the clock shows 4:12

now total time(min) lost on 4th day till when the clock shows 10:00 is x/90.
total time lost is also equal to the difference of the minutes passsed and minutes the clock shows has passed
ie x-minutes b/w 4:12 and 10:00
=x-(348 minutes)

x/90=x-348

solving gives x=351.9
thus minutes lost till when clock shows 10 is 351.9/90=3.91
total time lost since 1st day 48+3.91
thus coprrect time is 10:(51.91 )

Above answer was rated as good by the following members:
aks3937

August 26, 2008 07:05:10

superstardlx

Member Since: August 2008 Contribution: 2

RE: Exact Time

It will be around 10:52 a.m
The clock loses 16 min every day. On the 4th day implies 3 days have been completed. Hence it has lost 48 min. When it is 5:00 a.m it shows 4:12 a.m Hence when it is 11:00 a.m it shows 10:08 a.m. Every minute the clock loses 1/90 min i.e 2/3 of sec. Hence the actual time will be around 10:52 a.m

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September 14, 2008 12:33:08

kubersaini

Member Since: September 2008 Contribution: 1

RE: Exact Time

I think the exact time will be 10:51am because three days are complete so at the time 5:00am it will loses 48 min & 5:00am to 10:00am it will loses 3 to 4min more so the total time lose will be 51min.So exact time will be 10:51am.

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January 13, 2009 07:16:51

mariachristina

Member Since: January 2009 Contribution: 1

RE: Exact Time

8.56am

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January 15, 2009 12:44:03

saurabhgupta1389

Member Since: January 2009 Contribution: 4

RE: Exact Time

assume that x minutes have passed since 5:00 clock on the 4th day when clock shows 10:00

at the begining of 4th day 48 min have been lost(as wexplained in previous posts)
so at 5 the clock shows 4:12

now total time(min) lost on 4th day till when the clock shows 10:00 is x/90.
total time lost is also equal to the difference of the minutes passsed and minutes the clock shows has passed
ie x-minutes b/w 4:12 and 10:00
x-(348 minutes)

x/90 x-348

solving gives x 351.9
thus minutes lost till when clock shows 10 is 351.9/90 3.91
total time lost since 1st day 48+3.91
thus coprrect time is 10:(51.91 )

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1 0

Overall Rating: +1

March 12, 2009 14:03:46

pawansharma1987

Member Since: March 2009 Contribution: 6

RE: Exact Time

The answer is: The watch will show 9:08 am on 4th day
Because since everyday its losing 16 min so 3 days 48 min

In next 5 hrs it will lose by 3 min 20 sec almost. you can calculate it as
24 hrs 16 min loss
5 hrs (16/24)*5 3.3 min 3 min 20 sec
which
you add in 48 min
so this is how watch will be lost by 51 min 20 sec
and now watch will show 9:08 am in morning on 4th day!!

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April 09, 2009 07:51:25

rambala1985

Member Since: April 2009 Contribution: 1

RE: Exact Time

Per day 16 mintes lose means 24 hours 16 minutes losing so for 1 hour 16/24 2/3 minutes (2/3)*60 40 seconds

So 4days 16 minutes so 16*4 64 minutes.

from 5.AM to 10. AM 5hours so 5*40 seconds 200 seconds 200/60 3minutes 20 seconds.

so total lose (64+3)minutes+ 20 seconds 67minutes 20 seconds 1hour 7 minutes 20 seconds. so the exact time should be

10.00AM+1hour 7minutes 20 seconds 11:07:20 AM

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April 10, 2009 02:51:57

rtchauhan

Member Since: March 2009 Contribution: 2

RE: Exact Time

The clock loses 16 min a day ..
so it loses 48 min in 4 days...ok
if it loses 16 min in 24 hour so it loses 16/24 min in 1 hour
and
5*16/24 min loses in 5 hour...

therefore to reach 10 am on 4th day the time will lack by..

48+(5*16/24) min
hence the exact time will be...

9:08:66 am ANS...

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May 21, 2009 02:14:45

hydsarema

Member Since: August 2008 Contribution: 11

RE: Exact Time

on the fourth day at 5:00 am the clock would have lost 48 minutes.
since 5 hours have elapsed after 5:00 am
at 10:00 am we need to calculate the loss of time for 5 hours.

for 24 hours-------16 min loss
5 hours---------?

10/3 3.33

the total loss 48+3.33 51.33
the time would be 10:51:33

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October 28, 2009 05:16:01

prasannamohandas

Member Since: October 2009 Contribution: 3

RE: Exact Time

For three days it loses 48 min and for the 10 hrs on 4th day it loses 10/24*16 min i.e 6.666 min... so total 54.666 min it lost...

at ten hrs the exact time is 10 hrs 54.666 min.

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October 28, 2009 05:19:04

#10

prasannamohandas

Member Since: October 2009 Contribution: 3

RE: Exact Time

3 days 48 min.... lost

4th day for 5 hrs.....5/24*16 min 3.33 min.... so total 51.33 min...
exact time will be 10:51.33 hrs

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