Question

‘A’ alone can do a piece of work in 10 days and ‘B’ alone in 15 days. ‘A’ and ‘B’ undertook to do it for ₹42,000 with the help of ‘C’, they completed the work in 5 days, How much (in ₹ ) is to be paid to ‘B’?

A 14,000
B 15,000
C 21,000
D 7,000
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