Question

Harry can rake the leaves in the yard 8 hours faster than his little brother Jimmy can. If they work together, they can complete the job in 3 hours. Using complete sentences, explain each step in figuring out how to determine the time it would take Jimmy to complete this job on his own.

Answer 1

@Evoker @quickstudent @agent0smith

Answer 2

@FaiqRaees

Answer 3

Harry can do the job in H hours by himself lets say
While Johnny can do the job in J hours by himself lets say.

Answer 4

mhm

Answer 5

We know J=H+8

Answer 6

right

Answer 7

Oh now each hour Johnny will get 1/J of the job done, while Harry will get 1/H of the job done.

Answer 8

So in 3 hours 3/J + 3/H of the job will be done which is 1 full job

Answer 9

or 3/J + 3/H = 1