Answer:
1 / (Ryan's rate + Shawn's rate)
72 minutes
Step-by-step explanation:
Given that :
Ryan's time = 2 hours ; rate = 1 /2
Shawn's time = 3 hours ; rate = 1/3
A.)
Working together :
Take the reciprocal of the sum of Ryan and Shawn's rate
1 / (Ryan's rate + Shawn's rate)
B.) 1/ (1/2 + 1/3)
(1/2 + 1/3) = (3 + 2) / 6 = 5/6
Rate working together = 5/6
Time taken = 1 ÷ (5/6)
= 1 * 6/5
= 6/5 hours = 1.2 hours = (1.2 * 60) = 72 minutes
