VeritasPrepKarishma wrote:
paisaj87 wrote:
Darcy lives 1.5 miles from work. She can walk to work at a constant rate of 3 miles per hour, or she can ride the train to work at a constant rate of 20 miles per hour. If she rides the train, there is an additional x minutes spent walking to the nearest train station, waiting for the train, and walking from the final train station to her work. If it takes Darcy a total of 15 more minutes to commute to work by walking than it takes her to commute to work by riding the train, what is the value of x?
10.5
15
25.5
30
60
In such long stem questions, analyse each sentence as you go.
"Darcy lives 1.5 miles from work. She can walk to work at a constant rate of 3 miles per hour," - When she walks, she takes 1/2 hr or 30 mins to reach work.
"or she can ride the train to work at a constant rate of 20 miles per hour." - When she takes the train, she takes (1.5/20)*60 mins = 4.5 mins to reach work.
"If she rides the train, there is an additional x minutes spent walking to the nearest train station, waiting for the train, and walking from the final train station to her work." - Time taken to reach work by train = 4.5 + x
"If it takes Darcy a total of 15 more minutes to commute to work by walking than it takes her to commute to work by riding the train," - it takes her 30 mins to walk so it takes her 15 mins to go by train.
"what is the value of x? "15 = 4.5 + x
x = 10.5
Why are we assuming that the distance between Darcy's home to work(which is 1.5 miles) is the same distance between the two stations?
If you're answer is any of the following :
- There is no other information given so, we should assume.
-We need an answer and hence this is the only way to get as we would not get an answer if we bring in other distance variable.
-you've got to work with what you have.
-Assuming like this is correct and this is very much a GMAT like question.
Then, I'm scared, very very scared!! a person like me who is moving at Q45-47 is very very scared!! Help