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Question

It takes Mr. Rose 10 hours to complete a printing job.

His helper John can complete the same job in 15 hours.

If Mr. Rose and John work together, how long will it take them to complete the job?


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Solution

Finding the time For Both Mr. Rose and John to complete the job :

According to Question Rose Complete work in 10hours .

John Complete Work in 15 hours.

Work Done by Mr. Rose Per Hour is 110of total work.

Work Done by John per Hour is 115of total work.

Now Let's Assume They complete Work in t Hours

Total work is t110+115.

Lets represent total work by 1 and calculate t as shown:

t110+115=1t25150=1t=15025t=6hours

Hence, Mr. Rose and John both complete the printing job in 6Hours


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