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Marco rode his dirt bike at 40 miles per hour (mph) for two hours. If he then continued to ride at a different constant

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by BTGmoderatorDC » Mon May 22, 2023 7:59 pm
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Marco rode his dirt bike at 40 miles per hour (mph) for two hours. If he then continued to ride at a different constant rate for another three hours, and at the end of the three hours his average speed for the entire five hour ride was 30mph, what was his average speed over the three hour portion of his ride?

A. 14 mph
B. 20 mph
C. 70/3 mph
D. 80/3 mph
E. 34 mph


OA C

Source: Veritas Prep
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Re: Marco rode his dirt bike at 40 miles per hour (mph) for two hours. If he then continued to ride at a different const

by s_sandoval » Tue May 23, 2023 1:11 pm
BTGmoderatorDC wrote: ↑
Mon May 22, 2023 7:59 pm
 Marco rode his dirt bike at 40 miles per hour (mph) for two hours. If he then continued to ride at a different constant rate for another three hours, and at the end of the three hours his average speed for the entire five hour ride was 30mph, what was his average speed over the three hour portion of his ride?

A. 14 mph
B. 20 mph
C. 70/3 mph
D. 80/3 mph
E. 34 mph


OA C

Source: Veritas Prep
Hey guys, I need some help with this question. So, Marco rode his dirt bike at 40 mph for 2 hours, got that part. Then he rode at a different speed for 3 more hours, okay. And at the end of the 3 hours, his average speed for the whole 5-hour ride was 30 mph. The average speed for just the 3-hour portion is E, 34 mph, but that's not right. Expert help would be appreciated.
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