Washing his dad's car alone eight year old Levi takes 2.5 hours. if his dad helps him, then it takes 1 hour . how long does it take the levi's dad to wash the car by himself?

It will take Levi's dad 1.67 hours to wash the car alone.

Step-by-step explanation:

Time taken by Levi to wash car alone = 2.5 hours

Time taken by Levi and his father together = 1 hour

Let,

x be the time taken by Levi's dad.

Levi will contribute 1/2.5 hours and his dad will contribute 1/x to wash the car together.

Dividing both sides by 1.5

It will take Levi's dad 1.67 hours to wash the car alone.

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step-by-step explanation:

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