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
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30	31	1	2	3	4	5

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Multiple Choice Questions

Ram is 20 less efficient than Amit and Deepak is 50 more efficient than Ram If Amit Ram and Deepak t...........

Mental Ability (N tehsildar) Time and work

Ram is 20% less efficient than Amit and Deepak is 50% more efficient than Ram. If Amit, Ram and Deepak together can complete the work in 8 days, find the time taken by Amit and Deepak together to complete the work.

123/18 days

127/10 days

119/11 days

120/11 days

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Explanation:

Let the time taken Ram alone to complete the work be ‘x’ days.
Time taken by Amit alone to complete the work = x*0.80 = 4x/5 days
Time taken by Deepka alone to complete the work = x/1.5 = 2x/3 days
1/x+5/4x+3/2x = 1/8
=> x = 30
Time taken by Amit and Deepak alone to complete the work = 4x/5 = 24 and 2x/3 = 20 resp.
Required time together by Amit and Deepak = 1/[(1/24)+(1/20)] = 120/11 days

D: R :A

12:8:10

BY RATIO METHOD .

NOW , work = 30x 8=240

now effencies of deepak and amit = 12 + 10 = 22

=> 240 / 22

120/11

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