Question

a team of 20 people can construct a bridge in 40 days I will the team of 25 people can complete the same construction in 60 days if both teams work together in how many days will the bridge be constructed​

Answer 1

this is opposite question. 25 people construct the bridge in 40 days. and 20 people constructs bridge in 60 days.

then,

20/60=x/45

20×45/60=x

so,x=15.