Question 591641
It takes Frank 2 hours to mow his lawn, but it only takes
his dad 5 minutes to mow it. Find (in hours) how much longer it takes Frank to mow the yard than it takes his dad
.
convert 5 minutes into hours:
5  * 1/60 = 5/60 = 1/12
.
Dad's rate = 1 lawn per 1/12 hours
Frank's rate = 1 lawn per 2 hours
.
2 - 1/12
24/12 - 1/12
(24-1)/12
23/12 hours (answer)
.
That is, Frank takes 23/12 hours longer than his dad to mow the yard