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Elena-2011 [213]
3 years ago
12

A cyclist bikes x distance at 10miles per hour and returns over the same path at 8miles per hour .what is the cyclists average r

ate for the round trip in miles per hour
Mathematics
1 answer:
algol [13]3 years ago
3 0
Average speed = total distance travelled / time taken
 in this case total distance = 2x miles

time taken for first half of the journey = x/10 hours and for second part its x / 8  hours

average speed = 2x / ( x/10 + x/8)  = 2 x /  (  4x + 5x / 40)
=  2x  * 40 / 9x =  80 / 9  mph 8.89 mph
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