<u>Answer-</u>
<em>Jason will take </em><em>6 hours</em><em> to was the car alone.</em>
<u>Solution-</u>
Given that Wendy can wash a car twice as fast as Jason, i.e time taken by Jason is twice than that of Wendy for doing a same work.
Let us assume that,
Jason alone will take 2x hours, so Wendy alone will take x hours
So, the amount of work done by Jason in 1 hour is
Likewise, the amount of work done by Wendy in 1 hour is
Net work done by both in one hours is,
So, working together they will do th of work in 1 hour.
Then, the total time taken by them for completing the task or doing 1 job,
But, given in the question that they take 2 hours to complete the job, so
So, Wendy will take 3 hours to complete the task and Jason will take (3×2)=6 hours.