Both numerator and denominator are increased by 30

Question

Qn 87, Page 280. Answer credited is E.

d1/r1

d2 = (d1 + 30)
r2 = (r1 + 30)

Now, I cant think of any scenario where increasing the numerator and denomintor by an equal value will not cause the new fraction to be either equal to or greater than the old fraction? It certainly cannot be less than the old fraction - what am I missing?

kp1811 · Answer

please post the question as all may not have OG12 with them (I dont have :-|

)

lagomez · Answer

-30/-60 = 1/2

-30+30/-60+30 = 0/-30 = 0 less than 1/2

junker · Answer

See that explanation does not make any sense. d1 is distance and r1 is rate of speed. These cannot possible be negative. I dont think the explanation is correct yet.

Anybody care to explain hwo the answer credited in the book can be correct?

lagomez · Answer

I can't really understand what your asking

The question just wants to know if if t1 > t2

they can be equal or one can be greater so the answer is E

Not to sure where's the confusion

IanStewart · Answer

If we're dealing only with positive quantities:

If the numerator of a fraction is larger than the denominator, and you add 30 to both, the value of the fraction goes down:

10/3 is greater than 40/33, for example

If the numerator is smaller than the denominator, and you add 30 to both, the value of the fraction goes up:

1/2 is less than 31/32, for example

Both numerator and denominator are increased by 30

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards