Question

Anushka and duvya can complete a work in 12 days divya alone can complete the work in 20 days if anuskha does the work only half a day daily then how many days both together compleye the work

Answer 1

let wp of Anushka =x

x+(1/20)=1/12

(20x+1)12=20

20x+1=5/3

20x=2/3

x=2/60in full day

x=1/60 in half day

1/60+(1/20)=(1+3)/60=1/15in a day

no.of days=1/(1/15)=15days