It is currently 25 Nov 2020, 02:21

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# At the rate of

Author Message
TAGS:
Founder
Joined: 18 Apr 2015
Posts: 13892
GRE 1: Q160 V160
Followers: 313

Kudos [?]: 3676 [0], given: 12919

At the rate of [#permalink]  06 Jul 2019, 09:47
Expert's post
00:00

Question Stats:

62% (01:15) correct 37% (01:25) wrong based on 66 sessions
At the rate of $$\frac{x}{6}$$ miles for every y seconds, how many miles can an aircraft travel in z minutes? $$(xyz \neq 0)$$

A. $$\frac{xy}{6z}$$

B. $$\frac{xz}{6y}$$

C. $$\frac{xyz}{6}$$

D. $$\frac{10xy}{z}$$

E. $$\frac{10xz}{y}$$
[Reveal] Spoiler: OA

_________________
GRE Instructor
Joined: 10 Apr 2015
Posts: 3907
Followers: 163

Kudos [?]: 4766 [3] , given: 70

Re: At the rate of [#permalink]  07 Jul 2019, 05:08
3
KUDOS
Expert's post
Carcass wrote:
At the rate of $$\frac{x}{6}$$ miles for every y seconds, how many miles can an aircraft travel in z minutes? $$(xyz \neq 0)$$

A. $$\frac{xy}{6z}$$

B. $$\frac{xz}{6y}$$

C. $$\frac{xyz}{6}$$

D. $$\frac{10xy}{z}$$

E. $$\frac{10xz}{y}$$

We can solve this question with equivalent ratios

First recognize that z MINUTES = 60z SECONDS (since there are 60 seconds in every minute

We're told that the aircraft travels x/6 miles every y seconds
In other words, for every y seconds that elapse, the aircraft travels x/6 miles

Let D = the distance the aircraft travels 60z seconds.

We'll use the ratio: distance traveled/seconds elapsed

We get: (x/6)/y = D/60z
Cross multiply to get: Dy = (x/6)(60z)
Simplify: Dy = 10xz
Divide both sides by y to get: D = 10xz/y

RELATED VIDEO FROM MY COURSE

_________________

Brent Hanneson – Creator of greenlighttestprep.com

Re: At the rate of   [#permalink] 07 Jul 2019, 05:08
Display posts from previous: Sort by