Question 141

A can do a work in 20 days, while B can do the same work in 25 days. They started the work jointly. Few days later C also joined them and thus all of them completed the whole work in 10 days. All of them were paid total of ₹700. What is the share of C?

Solution

Given, A can do the work in 20 days.
B can do the work in 25 days
Efficiency of A = $$\dfrac{100}{20} = 5$$%

Efficiency of B = $$\dfrac{100}{25} = 4$$%

After few days, C joined.
If they work for 10 days, then (5+4)*10 = 90% of work will be completed by A and B.
Remaining 10% of work will be done by C.
Hence, Salary of C will be 10% of Rs.700 = Rs.70.


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