Question

15
7. 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​

Answer 1

We know that the number days taken to work is the reciprocal of the rate of the work i.e they are inversely proportional.

So, we calculate the work done by A=1/3

And the work done by B = 1/4

∴ Ratio of the work done = 1/3 : 1/4 i.e. 4:3