Today Dave drove from home to work at twice his regular speed and arri

Question

Today Dave drove from home to work at twice his regular speed and arrived at work 16 minutes earlier than he regularly arrives. What is the distance from Dave’s home to work?

(1) Dave regular drives at a constant speed of 40 miles per hour. 
(2) It regularly takes Dave 32 minutes to drive to work.

Archit3110 · Answer

distance = speed * time
time = distance / speed
let distance be d and speed be s
given
Dave drove from home to work at twice his regular speed and arrived at work 16 minutes earlier than he regularly arrives

d/2s =d/s -16/60
#1
Dave regular drives at a constant speed of 40 miles per hour. 
d/80 = d/40 -16/60
solve for d ; 64/3 ; 21.3 miles
sufficient
#2
It regularly takes Dave 32 minutes to drive to work.
d/s = 32 mins
d=32s
d/2s =d/s -16
so it took 16 mins when Dave drove at twice regular speed 
but no info about speed to calculate distance
insufficient
option A

WarpHarpupendra · Answer

im unable to find the optioins for any questions where can i find them
'

Bunuel · Answer

This is a data sufficiency question. Options for DS questions are always the same and usually omitted on the site.

The data sufficiency problem consists of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements, plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of the word counterclockwise), you must indicate whether—

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.
C. BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.
D. EACH statement ALONE is sufficient to answer the question asked.
E. Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

Hope this helps.

Today Dave drove from home to work at twice his regular speed and arri

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GMAT Data Sufficiency (DS) Questions

Today Dave drove from home to work at twice his regular speed and arri

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