gauravnagpal wrote:
Working together, printer A and printer B would finish the task in 24 minutes. Printer A alone would finish the task in 60 minutes. How many pages does the task contain if printer B prints 5 pages a minute more than printer A ?
A. 600
B. 800
C. 1000
D. 1200
E. 1500
I know this question is relatively symol if make an equation in one vaibale ...
I tried to do it by applying the fundamental of A = Jobs per min * time ( the way we typically solve the work problems ) and i was stuck
I did jobs per minute A , 1/60
combined rate = 1/24
so rate of b = 1/24 - 1/60 = 1/40
but could not arrive at the solution ... i tried to form the equation by assuming x as the total numbe of pages So x/60+ x+5/40 = cld nt take ot forward from here
kindly see where am I losing the track !
Why on earth would we not use PITA (Plugging In The Answers) rather than doing the algebra?!?! You get zero bonus points for doing the "real" math. The GMAT is not a math test. It is a test of whether you can get the right answers quickly, efficiently, without causing yourself fatigue, and without setting yourself up to make careless mistakes.
We know we need to be a multiple of 24 and of 60. B, C, and E are wrong. Cool, down to A and D. A looks easier to work with, so let's try that.
If the task is to print 600 pages and A can finish in 60 minutes, A prints 10 pages per minute. B prints 5 pages per minute more than A, so B prints 15 pages per minute. Together, they print 25 pages per minute. If they work together for 24 minutes, will they finish the 600 pages? Yep.
Answer choice A.
ThatDudeKnowsPITA