Question:
Tick (✓) the correct answer:
The rates of working of A and B are in the ratio 3 : 4. The number of days taken by them to finish the work are in the ratio
(a) 3 : 4
(b) 9 : 16
(c) 4 : 3
(d) 16 : 9
Solution:
(c) 4 : 3
The number of days taken for working is the reciprocal of the rate of work.
i.e., number of days taken $=\frac{1}{\text { rate of work }}=\frac{1}{3 / 4}=\frac{4}{3}$
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