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# If a driver travels m miles per hour for 4 hours and then travels 3m/4

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Math Expert
Joined: 02 Sep 2009
Posts: 55670
If a driver travels m miles per hour for 4 hours and then travels 3m/4  [#permalink]

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07 Jan 2019, 04:27
00:00

Difficulty:

25% (medium)

Question Stats:

71% (01:16) correct 29% (01:48) wrong based on 33 sessions

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If a driver travels m miles per hour for 4 hours and then travels 3m/4 miles per hour every hour thereafter, how many miles will she drive in 10 hours?

A. 15m/2

B. 8m

C. 17m/2

D. 10m

E. 21m/2

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Re: If a driver travels m miles per hour for 4 hours and then travels 3m/4  [#permalink]

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07 Jan 2019, 04:33
Bunuel wrote:
If a driver travels m miles per hour for 4 hours and then travels 3m/4 miles per hour every hour thereafter, how many miles will she drive in 10 hours?

A. 15m/2

B. 8m

C. 17m/2

D. 10m

E. 21m/2

distance in 4 hrs = 4* m =4m
distnace in 6 hrs = 6*3m/4 = 9m/2

total 9m/2+ 4m = 17m/2 IMO C
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Re: If a driver travels m miles per hour for 4 hours and then travels 3m/4   [#permalink] 07 Jan 2019, 04:33
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