The correct answer is 15.
$5 each car
3 hours = 12 cars
÷3 ÷3
1 hours = 4 cars
×8 ×8
8 hours = 32 cars
32 cars × $5 per car =
$160
They earned $160 in 8 hours, from washing 32 cars.
Basically, you have to do 755/12.5 That will give you your average per minute.
Transferring Mph to Mps, your answer would be: 3.4027778 meters per second
