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A can copy 50 papers in 10 hours while both A & B can copy 70 papers in 10 hours.

Then how many hours required for B to copy 26 papers?

Read Solution (Total 4)

A can copy 50 papers in 10 hrs. so in 1 hr it will copy 5 papers. A+B copy 70 papers in 10 hrs. so A+B will copy 7 papers in 1 hr. b will copy in 1 hr=(7-5)=2paper. so to copy 26 papers=26/2=13 hrs.
13 years agoHelpfull: Yes(19) No(2)

i think 13 hrs
13 years agoHelpfull: Yes(2) No(4)
If in 10 hours, A can copy 50 papers, and A and B together can copy 70, then B must be copying 20 papers in 10 hours.

This means B copies 2 papers per hour. 10 / 10 = 1 and 20 / 10 = 2

If B copies 2 papers every hour, then it would take 13 hours for it to copy 26 papers.
13 years agoHelpfull: Yes(1) No(1)
13 is theeeeeeeee anserrrrrrr
13 years agoHelpfull: Yes(1) No(1)

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