sachin kakkar (CA) (188 Points)
01 February 2011ANS IT IF U CAN WITH VALID SUPPORTING REASONS......
10 PEOPLE WORKING TOGETHER CAN PERFORM A TASK IN 10 HRS...
15 OTHER PEOPLE WORKING TOGETHER CAN PERFORM THE SAME TASK IN 5 HRS....
HOW MUCH TIME WOULD THESE 25 (10+15) PEOPLE TAKE TO PEFORM THE SAME TASK IF PUT TO WORK TOGETHER.....
CA'S REPLY SOON.......
ROHIT GARG
(student ca final)
(484 Points)
Replied 01 February 2011
i think...
200 mintues(3 hrs 20 mintue)
Hardik Shah
(Properitor)
(48 Points)
Replied 01 February 2011
| Originally posted by : sachin kakkar | ||
 |
ANS IT IF U CAN WITH VALID SUPPORTING REASONS...... 10 PEOPLE WORKING TOGETHER CAN PERFORM A TASK IN 10 HRS... 15 OTHER PEOPLE WORKING TOGETHER CAN PERFORM THE SAME TASK IN 5 HRS.... HOW MUCH TIME WOULD THESE 25 (10+15) PEOPLE TAKE TO PEFORM THE SAME TASK IF PUT TO WORK TOGETHER..... CA'S REPLY SOON....... |
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Only 5 hours, because as you had said that " 15 other people working together".
Please reply for right or wrong.
CS BHAVIK HARSHAD SHAH
(Company Secretary)
(1662 Points)
Replied 01 February 2011
it must be 8 hours & 33 minuts
becoz people r incresg but they have to perform 1 task
so they take more time
Ankit Gupta
(Learner)
(1557 Points)
Replied 01 February 2011
but y will they be joinin together and doing the task.. coz the task has already been completed by 10 and other 15 people!!
Nish Agr
(-)
(107 Points)
Replied 01 February 2011
The relation ship between no of workers and time taken is not linear. Hence, we have to use differentiation to get the answer.
Lakshmi,
Good joke. er ... that was a joke, right?
santhosh prasanna
(Manager Finance)
(280 Points)
Replied 02 February 2011
sachin kakkar
(CA)
(188 Points)
Replied 02 February 2011
u r close guys...
keep trying... i m sure v have gr8 minds in cci....
i m sure v can get a rit ans...
nd plz do post d logic of ur ans along with....
thx nd all d best.........
Ranjeet kumar sahu
(CWA Qualified/CA/CS)
(186 Points)
Replied 02 February 2011
It will take 3hrs and 20 mins to complete the task
solution:
10 persons can do the work in 10 hours so 1 person can finish the work in 100hrs i.e he is capable of doing 1/10th of work each hour.
similarly 15 persons can do the task in 5 hours so 1 person can finish the work in 75hrs i.e. he is capable of doing 1/5th of work each hour.
Now if all the 25 persons(i.e10+15persons) will finish the task than it will take 3hrsand 20 mins as below:
when combined the force now the capacity of total force of doing the work per hour is 1/10+1/5=3/10th per hour.
and in total they can finsish the work in 3hrs and 20 mins
CAclubindia
