TCS
Company
Numerical Ability
Clocks and Calendars
The famous church in the city of Kumbakonam has a big clock tower and is said to be over 300 years old. Every Monday 10.00 A M the clock is set by Antony, doing service in the church. The Clock loses 6 minutes every hour. What will be the actual time when the faulty clock shows 3 P.M on Friday?
I am asking this question because no body has given unique correct answer.
Please don't give links of answer.
I need correct answer with full solution.
Highly confused.
Also what is the real meaning of "The Clock loses 6 mins every hour".
Means when actually 1 hr passes then faulty clock shows 54 min or
when actually 1 hr 6 min passes then faulty clock shows 1 hr.
Read Solution (Total 12)
-
- Let us start from Monday 10 am to friday 3.00 pm.....total hours=4 days 5 hrs.=4*24+5=101 hrs.
so total time loses=101*6 minutes=606 minutes=606/60=10 hrs 10 minutes
so actual time=friday 3.00 pm +10 hrs 10 minutes=staurday 1.10 am. - 9 years agoHelpfull: Yes(32) No(6)
- Total hours from Monday 10.00 AM to Friday 3.00 PM =101 HOURS
The clock loses 6 minutes every hour. In 101 hours it will lose 101 x 6 =606 minutes. ie 10 hours 06 minutes.
To find the actual time, calculate 10 hours 6 min backwards from Friday 3.00 PM which is 4 .54 AM
Hence the actual time would be 4 .54 AM when clock shows 3.00 PM on Friday. - 9 years agoHelpfull: Yes(8) No(10)
- WELL its clear that the total hours form Monday 10am to friday 3pm its 101hours.
and each hour the clock looses 6 min (i.e 60 min in clock is 66min in actual).
so the clock looses 101*6min = 606 min in total = 10hrs 6min.
thus we will get the actual time by adding 10hrs 6min with 3pm(friday),
which becomes 1:06am Saturday - 9 years agoHelpfull: Yes(5) No(2)
- Monday 10am to friday 3pm = (monday 10 am to friday 10am) + (friday 10am to 3pm)=4days + 5 hrs= 101 hrs
Total loses time = 101*6=606 minutes =606/60 miniutes= 10 hrs 6 min
so actual time = friday 3pm + 10 hrs 6 min = Saturday 1:06 am - 9 years agoHelpfull: Yes(3) No(1)
- ankit rana why have u calculated 10hrs 6min backward???
- 9 years agoHelpfull: Yes(1) No(1)
- 4:54 is the ans coz
tuesday has 24 hours means 10am to 10am total 24 hours si,ilarly for wednesday and thursday
24hrs and 24hrs respectively
friday has 5 hours from 10am to 3pm
so 24+24+24+5=101 hours
min loses=101*6=606
606=10hrs and 6min
so go backward 10hrs 06min
we get 4:54am - 9 years agoHelpfull: Yes(1) No(1)
- By losing it means 54 min for 1hr, now on every hour it is losing 6 mins so in 24 hours its losing 24*6,
for 4 days it is 21*6*4=576
now when it is actually 3pm the clock is 576+30 min = 606 min slow that is it is showing 5.06 am
now for 3pm it has to go 10 hours more, however on every hour it loses 6 min so it will lose 10*6 mins more hence it has to go anothr 11hrs,
Thus the answer is 5.06+11=16.06=4.06pm on saturday - 9 years agoHelpfull: Yes(0) No(6)
- Total hours from Monday 10.00 AM to Friday 3.00 PM =101 HOURS
the clock loses 6 mint/hr i.e 144 mint=2hr 40 mint in 24 hr
Now,21hr 20 mint of this clock=24 hr of correct clock
64/3 hr of this clock=24 hr of correct clock
101 hr of this clock =24*3/64*101=123 hr 42 mint of correct clock
so totally it loses (123hr 42 mint-101hr)=22hr 42 mint
so,now if we add this excess time we will get the actual time i.e. 1pm 42 mint of saturday - 9 years agoHelpfull: Yes(0) No(3)
- Anyone plz forward it to me v.abhishek999@hotmail.com
- 9 years agoHelpfull: Yes(0) No(3)
- 1am:6min saturday is the correct timing
- 9 years agoHelpfull: Yes(0) No(0)
- actually 1 h 6 min passes then faulty clock shows 1 h.
- 6 years agoHelpfull: Yes(0) No(0)
- If the clock is losing time, that means it is going slower than normal, i.e. it is going slower by 6 minutes every hour.
That means every 1 hour it will only 54 minutes.
So calculating the time between Monday 10 AM to Friday 3 PM we get 101 hours.
Now the actual number of hours can be got in 2 steps:
Step 1: Calculate how many total number of minutes happen between the two times that we are talking about - 101 * 60 minutes = 6060 minutes
Step 2: Calculate how many times 54 minutes happen in 6060 minutes i.e. divide 6060 minutes in 54 minutes slots and that many hours should have passed i.e.
6060/54 = 112.22 = 112 hours and 12 minutes should have passed
i.e total extra = 112 hours 12 minutes minus 101 hours = 12 hours 12 minutes extra should have passed
Thus the actual time is 3 PM Friday +12 hours 12 minutes = 3:12 AM Saturday - 5 years agoHelpfull: Yes(0) No(0)
TCS Other Question