Sarah spends

1
6
hour vacuuming her mom's car. She spends 4 times as long washing the car. What is the total amount of time Sarah spends washing her mom's car?

A.
1
1
6
hours

B.
2
3
hour

C.
4
1
6
hours

D.
5
6
hour vacuuming

Sarah spends 1/6 hour vacuuming her mom's car.

She spends 4 times as long washing the car, which is 4 * 1/6 = 2/3 hour.

The total amount of time Sarah spends washing her mom's car is 2/3 hour.

Therefore, the answer is option B: 2/3 hour.