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A courier van delivers a package from office A to office B. If the van
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Bunuel
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A courier van delivers a package from office A to office B. If the van [#permalink] New post  08 Sep 2021, 03:48
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A
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E

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35% (medium)

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76% (02:07) correct 24% (02:02) wrong based on 51 sessions

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A courier van delivers a package from office A to office B. If the van travels the 20 miles between the two offices at 50 miles per hour, how fast must the van travel on the return trip if the roundtrip travel time is to be 40 minutes?

A. 55 mph
B. 60 mph
C. 65 mph
D. 70 mph
E. 75 mph
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Bacco361
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Re: A courier van delivers a package from office A to office B. If the van [#permalink] New post  08 Sep 2021, 14:29
So, Formulas needed: R*T=D

If the Van drives 50 mp/h and the distance is 20 miles, he needs 20/50 of an hour or 24min. (50*T=20)
So for the way back or the round trip, he has 16 minutes or 4/15 of an hour. Put this into the formula and you get 75 mp/h. (R*4/15=20)

IMO E
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Tango3
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Re: A courier van delivers a package from office A to office B. If the van [#permalink] New post  18 Sep 2021, 09:30
Time taken to travel first 20 miles - 20/50 which is 24 minutes

total roundtrip time is 40 minutes so now we have to calculate for remaining 16 minutes

distance traveled while coming back - 20 miles

no plugin values and check which one give you 16 minutes. option E ( 20/75) would give us 16 minutes

IMO E
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Re: A courier van delivers a package from office A to office B. If the van [#permalink]
18 Sep 2021, 09:30
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