Question

Suppose a runner takes 45 min to run a route a 8 mi/h at the beginning of training season. By the end of training season, she can run the same route in 38 min. What is her speed at the end of training season?

Answer 1

@amistre64 @mertsj @hartnn @Hero @ParthKohli @ivettef365

Answer 2

equate the distances,
use Distance = Speed / Time

Answer 3

Her route's length is ...?

Answer 4

Well, 45/8=

Answer 5

5.6

Answer 6

so, speed1/ time1 = speed2/time2
time 1 = 45, speed1 = 8
time2 =38
find speed2, you will get that in mi/h

Answer 7

mi.

Answer 8

\[\dfrac{8 \rm ~miles}{\rm hour} \div 45 ~ \rm minutes\]

Answer 9

is the distance.

Answer 10

So multiply those 2? to reverse the equation?

Answer 11

no need to find distance...to get exact distance we have to do conversions...if we do the proportionality, we directly get speed in mi/hr

Answer 12

When you get the distance, you know that the runner covers the same distance.

Answer 13

45/8 = 35/x
just find x

Answer 14

**38/x

Answer 15

x=6.2repeating

Answer 16

ooh 38..

Answer 17

45/38=1.18421526
8/1.18421526=6.755528551

Answer 18

So 6.8

Answer 19

yeah, thats her speed. in mi/h

Answer 20

45/38=1.2
8/1.2=6.6repeating

Answer 21

ok thnks all done...gee i havent gone to bed since like 7:00 am yesterday morning

Answer 22

:z

Answer 23

I need to catch some Zzzzzzzzzz's

Answer 24

-_- *snoring*

Answer 25

sleep well :) sweet dreams :)