Time & Work
Question asked by: Chanakya69
Asked on: 09 Nov 2008
You are only as quick as the slowest person, therefore it will take 15 hours.
By: Unknown
Average rating for this answer is 2.5 / 5
Rate Answer
Comment or provide your answer to this question
Comments and other answers:
A's and B's 1 day work will be 1/12 and 1/15 respectively.
In 1st 2 hrs work done = (1/12)+(1/15)
= (3/20)th part of field
In first 6 * 2 = 12 hours
= (6 * 3)/20
=(18/20)th part
Remaining work = 1-(18/20)
= 1/10
In 13th hour A will mow (1/12)th part of the field
so remaining work = (1/10)-(1/12)
= (6-5)/60
= 1/60
B will finish mowing in [(1/60)/(1/15)] hrs
= (1/60) * 15
= 1/4 hrs
= 60 min
Total time taken = 12 +1 +(1/4)
= 13 hrs 15 min
So work will finish at 5 + 13.15
= 18.15 hrs
= 6.15 pm
By: Chanakya69
Date of comment: Fri, Dec 5th 2008
By: Chanakya69
Date of comment: Fri, Dec 5th 2008
Ask a New Question
Find out more about Maths
Find out more about Maths
Maths Questions and Answers
maths school questions Questions and Answers
Next question: What is the next number in the sequence 2, 10, 12, 17, 18, 19?
Become a Member! It's Free >>>
Share on Facebook:
On Twitter:
Tweet this!
More Questions:A What Divides A Circle Into Two Halfs
What Number Is 378 More Than 1756
Help!
If I Work From 7.45am To 3.30pm Monday To Friday, How Many Hours Do I Work In A Week?!?
Difficulty With Fractions