Answer: it will take them about 24 minutes working together
Step-by-step explanation:
1/40 + 1/60 =
6/240 + 4/240 = 10/240 = 1/24
1/24 = 1/t
Cross multiplication:
1*t = 1*24
t= 24
Change 55% to 0.55
0.55 x 2900 = 1595
39
Divide 78 by 2 to get 39 and add in to the number