Question 1084878
Hilda takes x minutes, Stan takes 2x minutes
in 1 minute, Hilda does 1/x and Stan does 1/2x
that sum=60 minutes
so 1/x+1/2x=1/60, the proportion that is done by both in 1 minute
multiply everything by 60x
60+30=x
x=90 minutes for Hilda, and 2x=180 minutes for Stan
in 60 minutes, Hilda does 2/3 and Stand does 1/3, sum is 1.