GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Oct 2019, 23:31

### 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

# A balloon drifts x miles in y hours and z minutes.What is the speed of

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 58335
A balloon drifts x miles in y hours and z minutes.What is the speed of  [#permalink]

### Show Tags

07 Mar 2019, 03:08
00:00

Difficulty:

15% (low)

Question Stats:

86% (01:18) correct 14% (01:13) wrong based on 35 sessions

### HideShow timer Statistics

A balloon drifts x miles in y hours and z minutes.What is the speed of the balloon in miles per hour?

A. x/(y + z)

B. 60x/(60y + z)

C. x + y/z

D. y/(x + 60z)

E. z/(x + y)

_________________
Senior Manager
Joined: 13 Jan 2018
Posts: 342
Location: India
Concentration: Operations, General Management
GMAT 1: 580 Q47 V23
GMAT 2: 640 Q49 V27
GPA: 4
WE: Consulting (Consulting)
Re: A balloon drifts x miles in y hours and z minutes.What is the speed of  [#permalink]

### Show Tags

07 Mar 2019, 04:13
1
y hours z minutes is nothing but $$y\frac{z}{60}$$ hours, i.e, $$\frac{60y+z}{60}$$ hours.

Speed in miles/hr = $$\frac{x}{\frac{60y+z}{60}}$$ miles/hr
= $$\frac{60x}{60y+z}$$

OPTION: B
_________________
____________________________
Regards,

Chaitanya

+1 Kudos

if you like my explanation!!!
Manager
Joined: 10 Nov 2014
Posts: 63
Location: United States
Concentration: Marketing, Strategy
Re: A balloon drifts x miles in y hours and z minutes.What is the speed of  [#permalink]

### Show Tags

07 Mar 2019, 05:47
1
speed=distance/time

distance = X miles
Time = Y hrs and Z mins
= y+z/60
= =60y+z/60

putting values in formula of speed :
60x/60y+z

Posted from my mobile device
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 4987
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: A balloon drifts x miles in y hours and z minutes.What is the speed of  [#permalink]

### Show Tags

07 Mar 2019, 06:22
Bunuel wrote:
A balloon drifts x miles in y hours and z minutes.What is the speed of the balloon in miles per hour?

A. x/(y + z)

B. 60x/(60y + z)

C. x + y/z

D. y/(x + 60z)

E. z/(x + y)

total time = y+z/60 ; 60y+z/60
so
distance = x
x = 60y+z/60 * speed
speed = 60x/(60y + z)
IMO B
_________________
If you liked my solution then please give Kudos. Kudos encourage active discussions.
Re: A balloon drifts x miles in y hours and z minutes.What is the speed of   [#permalink] 07 Mar 2019, 06:22
Display posts from previous: Sort by