If A can copy 50 pages in 10 hours and A and B together can copy 70 pages in 10 hours, how much time does B takes to copy 26 pages?if anyone know the ans for this apps question pls tell me

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Answered by: itwasnoteasy

  • Nov 15th, 2006


you assumed that they together can copy 140 pages coz' 70 per head, which is wrong. its clearly mentioned 70 pages together. if you go by your way it would 140-50 = 90 which B can copy in 10 hrs. which is not right.Rather, 70-50 = 20, which B can copy in 10 hrs. so B would copy 26 pages in:(26/20)*10 = 13 hrs.

Showing Answers 1 - 30 of 30 Answers

Satyaki Roy

  • Oct 30th, 2006
 

A can copy 50 pages in 10 hrs.

A can copy 5 pages in 1hr.(50/10)

now A & B can copy 70 pages in 10hrs.

thus, B can copy 90 pages in 10 hrs.[eqn. is (50+x)/2=70, where x--> no. of pages B can copy in 10 hrs.]

so, B can copy 9 pages in 1hr.

therefore, to copy 26 pages B will need almost 3hrs.

since in 3hrs B can copy 27 pages.

itwasnoteasy

  • Nov 15th, 2006
 

you assumed that they together can copy 140 pages coz' 70 per head, which is wrong. its clearly mentioned 70 pages together. if you go by your way it would 140-50 = 90 which B can copy in 10 hrs. which is not right.Rather, 70-50 = 20, which B can copy in 10 hrs. so B would copy 26 pages in:(26/20)*10 = 13 hrs.

Vijayakumar

  • Dec 20th, 2006
 

Little elaborative

If A can copy 50 pages in 10 hour, Then

A = 50,

If A + B can copy 70 pages in 10 hour, then say

A + B = 70

B = 70 - 50 (Substituted A's value since A can copy 50 pages in 10 hour)

B = 20  but for 10 hours.

20 pages = 10 hour

1 page = 10/20 => 0.5hr

26 pages = (26 * 0.5) or (26 * 1/2)

26 pages = 13 hour

Ranganath

  • Feb 14th, 2007
 

A can type 5 pages in an hour 50/10A and B can type 7 pages in one hour 70/10A and B 7 pages and A alone types 5 pages in one hour so diff s 2 pages so B types 2 pages in one hour for B2 pages -1 hour26 pages - x hoursso b can type 26 pages in 13 hours

RANA

  • Mar 19th, 2007
 

1.5 hrs

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kanimozhi

  • Sep 22nd, 2011
 

1hr and 18mins

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dhiv

  • Sep 23rd, 2011
 

13 hours

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jaya prakash

  • Sep 26th, 2011
 

In 10 hours A and B can copy 70 pages.
50+x=70,where x=no. of pages copied by B in 10 hours.
s0,x=20 pages in 10 hours.
so,time taken for 26 pages =10/20*26=13 hours.

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rohit

  • Sep 26th, 2011
 

13 hours for B to print 26 pages

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mohan bhavariya

  • Oct 6th, 2011
 

a in 1 hour 5 pages
both in 1 hour 7 pages
means b 2 pages in 1 hour.
so 26 pages in 13 hour ok.

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kishore

  • Oct 6th, 2011
 

13

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prashant chitte

  • Dec 20th, 2011
 

25

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Vivek.B

  • Jan 26th, 2012
 

13

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vivek

  • Mar 3rd, 2012
 

in 10 hrs b write= 70-50=20
20 pages-in------10 hrs
therefore1 page in 1/2 hrs
therefore 6pages in 3 hrs
therefore 20+6 in 10+3 hrs
so the ans. is 23 hrs

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  • Oct 13th, 2012
 

13

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RAHUL UBHALE

  • Aug 26th, 2014
 

A can copy 50 pages in 10 hrs
A & B together can copy 70 pages in 10 hrs

As time is same
only B can copy (A&B)-(A)=70-50=20 pages in 10 hrs

then B can copy 26 pages in=26pages*10hrs/20pages=13hrs

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rachana

  • Jan 6th, 2015
 

3 hours

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rajnish kadyan

  • Jul 20th, 2015
 

As 1 hr wrk = 50/10=5 pages
A+B 1 hr wrk= 70/10=7 pages
Bs 1 hr wrk = (A+B) - A
=7-5=2 pages
So B can type 26 pages=26/2
=13 pges

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Fasid

  • Jul 29th, 2015
 

13hours

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suresh

  • Aug 16th, 2015
 

7.5 hours

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rahul ghosal

  • Sep 24th, 2015
 

3 hrs

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shikha raghuwanshi

  • Oct 29th, 2015
 

In 10 hr A can copy 50 Page and in 10 hr A+B can Copy 70 page means in 10 hr B can copy only 20 page
so 20 page copy in 10 hr by B.
1 page copy By B = 10/20
26 page copy By B = 10/20*26
=13 hrs

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AJAY SAH

  • Nov 13th, 2015
 

According to the question, A can copy 50 pages in 10 hours, so A can copy 5 pages per hour.
similarly A+B can copy 7 pages per hour.
5+B=7 pages per hours, because A=5 pages per hour
=> B=2 pages per hour , then B complete 26 pages in 13 hours.
so, ans=13hours.

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anil

  • Sep 20th, 2016
 

PERSONS PAGES HOURS
A-> 50---> 10H
A+B-> 70--> 10H
SOLUTION:
A--> 70--> (10/50)*70==14H
B--> 70--> ?
A+B 70 10H
1/14+B=1/10=>1/35
SO,B--> 70 35H
B 26 ??
(70/35)*26=13
THEREFORE
B---> 26-----> 13H

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DHINESH

  • Sep 22nd, 2016
 

A=50 Pages ------->1O HOURS
A+B=70 Pages ------->1O HOURS
==>50+B=70
==>B=70-50=20 Pages----->10 HOURS
So, B=20/10=2 Pages Per Hours
B=26 Pages
B=26/2=13 Hours.

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chandradeepak

  • Nov 18th, 2016
 

diffr 20=10
1=10/20*26=13

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Tu Nguyen

  • May 28th, 2017
 

B can copy 20 pages in 10 hours =>> It will take 13 hours for to copy 26 pages

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