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Time and Work Practice Test 4 with solutions
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© examsnet.com
Question : 17
Total: 40
A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
20 days
15 days
13 days
11 days
Validate
Solution:
Ratio of efficiency of A and B = 130 : 100 = 13 : 10
Hence, ratio of their time taken = 10 : 13
Then time taken by B to complete the work = 13 ×
23
10
=
299
10
So, (A + B)'s 1 day's work =
1
23
+
10
229
=
23
299
=
1
13
Hence, working together they will complete the job in 13 days.
© examsnet.com
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