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Multiple Choice Questions

A can do a particular work in 6 days B can do the same work in 8 days A and B signed to do it for Rs...........

Quantitative Aptitude(IBPS RRB PO) Time and work

A can do a particular work in 6 days . B can do the same work in 8 days. A and B signed to do it for Rs. 4000. They completed the work in 3 days with the help of C. How much is to be paid to C?

380

600

500

450

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Explanation:

Solution:
A =6
B =8
. A B C A+B+C
Days 6 8 24 3
. (6*4) (8*3) (24*1) (8*3) LCM 24
Units 4 3 [8-(4+3] 1 8(total unit)
So C work 24 days to complete a work.
Then the ratio 1/6 : 1/8 : 1/24 = 4 : 3 : 1
Now total amount Rs4000 ie (ratio 4+3+1) 8 ==4000
. 1(C’s ratio)=? 4000/8*1=500Rs
Amount paid to C is Rs 500.

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