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20 May 2016, 00:18
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:06) correct
17%
(01:38)
wrong
based on 147
sessions
History
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Not Attempted Yet
There are 120 saplings to be planted in an orchard. Ben and Sue working together without a break can complete the job in six hours. How long would it take Ben working alone to complete the job?
(1) Sue plants 3 saplings in the time it takes Ben to plant 2.
(2) Sue working alone would take 10 hours to do the job.
(1) Sue plants 3 saplings in the time it takes Ben to plant 2.
(2) Sue working alone would take 10 hours to do the job.
20 May 2016, 06:13
Kudos
Bookmarks
through A we can guess the ratio of ratio of rates through which we can calculate individual rates as total is can be calculated(20 units / hr)
through B we can again calculate rate of ben.
So answer is D
through B we can again calculate rate of ben.
So answer is D
20 May 2016, 10:23
Kudos
Bookmarks
Bunuel
Given information- B and S working together plant 120 saplings in 6 hrs.
Question asked- How long would it take B to complete the job?
(1) Sue plants 3 saplings in the time it takes Ben to plant 2.
This statement tells that ratio of S:B= 3:2
In 6 hrs S will plant= 120*3/5
and, B will plant= 120 *2/5
When we know that B plants 120 *2/5 saplings in 6 hrs, we can calculate how many hrs will he take to plant 120 saplings.
(2) Sue working alone would take 10 hours to do the job.
Pretty straight!
1/B+1/S= 1/6
1/B+1/10=1/6
We can find the value of B
D is the answer
