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1. |
A can do a certain job in 25 days which B alone can do in 20 days. A started the work and was joined by B after 10 days. The number of days taken in completing the wotk were ? |
A. | 14(2/3)kmph |
B. | 15(2/3)kmph |
C. | 16(2/3)kmph |
D. | 17(2/3)kmph |
Answer» D. 17(2/3)kmph | |