Question

Shaily and Samta can complete a given work in 15 and 20 days respectively. If they work on it together for 4 days, then what fraction of the work is left ?​

Answer 1

Answer:

7/15

Step-by-step explanation:

one day work of shaily=1/15

one day work of samta=1/20

one day work of both =1/20+1/15

in 4 days they complete= 4(1/20+1/15)

Taking LCM of 20 & 15 as 60

then 4(3+4)/60

= 4*7/60

= 7/15