Sun	Mon	Tue	Wed	Thu	Fri	Sat
23	24	25	26	27	28	1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
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23	24	25	26	27	28	29
30	31	1	2	3	4	5

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Multiple Choice Questions

P does half as much work as Q does in 1 5 of the time Both working together can take 20 days to comp...........

Elelmentary Mathematics (UPPCS) Time and work

P does half as much work as Q does in 1/5 of the time. Both working together can take 20 days to complete the work. No of days P take to complete the work alone.

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Explanation:

Answer & Solution
Answer – a) 28
Solution:
Let Q complete the work in ‘T’ time. In one day, work done by Q is equal to 1/T. In five days, work done by Q is 5/T.
It is given that P does half as much work in 1/5 of the time. So P does 1/2 of the work. i.e 5/2T
So (1/T + 5/2T) = 1/20. So T = 70.
So P takes 2T/5 days. (2*70)/5 = 28days.

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