It costs $2 for the first 15 minutes to use the bumper cars at a fair ground.

It costs $2 for the first 15 minutes to use the bumper cars at a fair ground. After the first 15 minutes it costs $6 per hour. If a certain customer uses the bumper cars for 3 hours and 25 minutes, how much will it cost him?

Quiz

Answer/Solution

$21

Steps/Work

3 hrs 25 min = 205 min
First 15 min ------> $2
Time left is 190 min...
Now, 60 min costs $ 6
1 min costs $ 6/60
190 min costs $ 6/60*190 => $ 19
So, Total cost will be $19 + $2 => $ 21
The answer will be (D) $21