Question

Renu can weave 1/3 of a sari in 10 days while Sara can weave 1/5 of it in 9 days.  In how many days they can weave a sari, working together?

Answer 1

here is your answer

renu = $\frac{1}{3}$*10 =$\frac{1}{30}$

sara = $\frac{1}{5}$ * 9 =$\frac{1}{45}$

together= $\frac{1}{30} + \frac{1}{45} = \frac{5}{90}$= 18 days

Answer 2

in 18 days both can weave the saari