Question

A car repair shop charged $80 per hour for labor and $210 for the parts of a car. If the total cost was $490, how many hours did it take to repair the car?

Answer 1

`3 1/2`hours

Explanation:

Here total cost is $490 and cost of the parts is $210.
So, total repair charge = $490-$210 = $280.

Repair shop charges $80 for 1 hour labor.
Therefore no. of hours required to repair the car = `$280-:$80 = 3 1/2` hours

Answer 2

`3 1/2"hours"`

Explanation:

Subtract the cost of parts from total cost. This will leave us with the cost of labour.

`rArr$490-$210=$280larr" cost of labour"`

Dividing cost of labour by $80 will give the number of hours spent on repairing the car.

`rArr280/80=3.5larr" number of hours"`

Thus `3.5" or " 3 1/2" hours spent on repairing the car"`