Question

As a punishment for something naughty that we did, my little brother and I have to whitewash both sides of a fence. We start at the same time, and we each work at a constant rate. If we each whitewash one side, I'll finish in $2$ hours and my brother will finish in $3$ hours. But I'm a nice kid, so after I finish my side, I go around to the other side and help my brother finish his side. From the time I start helping him, how many minutes does it take us to finish the job?

Answer 1

Hope this helps you.....

Have a nice day....

Answer 2

24 Mins to finish after start Helping

Step-by-step explanation:

I Finish Work  in 2 hrs

Work done in  1 Hr = 1/2

Brother Finish work  in 3 Hrs

Work done in 1 hr = 1/3

Let Say both Complete Work in T  hrs

as it has to be painted on both sides

Then  T ( 1/2 + 1/3)  = 2

=> T * 5/6 = 2

=> T = 12/5

=> T = 2 Hr  24 Mins

I will Take 2 Hrs to finish my work

& 24 Mins to finish after start Helping

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