Question 922231
rate for A alone 8
rate for A & B together 25
1/a+1/b=1/x
1/8+1/b=1/25
1/b=1/25-1/8
1/b=8/200-25/200
1/b=-17/200
1/b=1/-11.7647059
b=-11.7647059
rate for B alone 11.7647059 minutes to drain
check
1/8+1/-11.7647059=1/25
-11.7647059/-94.1176471+8/-94.1176471=1/25
-3.76470588/-94.1176471=1/25
ok
codewa