What I know
Manny Kerr runs a company that specializes in grooming and caring for lawnsManny has a push mower and powerful riding mower
At one location takes 5 hours with mower
Takes 70 minutes with powerful riding mower
After 90% was cut using the rest was cut with powerful riding mower
How many minutes did it take for Manny to cut the entire lawn
Solution
We need to find 90% of 70
0.9 x 70 = 63 minutes for power riding mower to mow the 90% of the lawn
Takes 5 hours with mower to mow entire lawn so into minutes is 5 x 60 = 300
Takes 300 minutes for mower to mow entire lawn
We need to find 10% of mower 300 divided by 10 = 30
So add them 30 + 63 = 93
So it would altogether take 93 minutes to mow 90% with power mower and 10% with mower
