2006-09-07 07:25:34 · 13 answers · asked by april g 1 in Science & Mathematics ➔ Mathematics
5.2 / 30 = 2.5 / x
5.2x = 75
x = 14.42 minutes = about 0.2403 hours
2006-09-07 07:27:55 · answer #1 · answered by rahidz2003 6 · 0⤊ 0⤋
5.2 miles in 1/2 an hour becomes 10.4 miles in an hour.
How long to travel 2.5 miles at 10.4 miles per hour =
2.5/10.4 = 25/104 or something close to .24 hours.
Another way is to assume a constant rate and use the d = rt formula:
r = d1/t1 = d2/t2 or, 5.2 miles/30 minutes = 2.5 miles/x minutes.
5.2 x = 30 * 2.5
x = 30 * 2.5 /5.2 = 30 * 25/52 = 15 * 25 / 26 minutes.
2006-09-07 07:37:15 · answer #2 · answered by tbolling2 4 · 0⤊ 0⤋
5.2 MILES=30/60 HOURS
2.5 MILES= ?
=2.5*(30/60)/5.2
=2.*1/2*1/5.2
=0.24038 HOURS will it take him to run 2.5 miles.
2006-09-07 08:26:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
By observation u can estimate the answer will be roughly half of 30min or ~15min as 2.5miles is roughly half of 5.2 miles.
Mathematically this can be solved using simple ratio n proportion principles. Simply put this is just another simple parts in whole division problem.
Assuming a linear relationship that is speed is constant then given: 5.2miles = .5 hr
find 2.5miles = x hr
gives x hrs= 1.25 / 5.2
x= 0.24hrs or 14.42 min
2006-09-07 08:32:30 · answer #4 · answered by mydcmbrgirl 2 · 0⤊ 0⤋
the variation is direct
so 5.2:30::2.5:x
5.2x=75
x=75/5.2 min=14 min and 25 sec
2006-09-07 07:28:50 · answer #5 · answered by raj 7 · 0⤊ 0⤋
30 min = 1/2 hour
Speed of the runner in miles/hour:
=5.2/0.5
=10.4
2.5/10.4= 25/104 hours
=0.24 hours (14.4 min)
2006-09-07 08:24:09 · answer #6 · answered by Jenelle 3 · 0⤊ 0⤋
(5.2)/(30) = (2.5)/x
5.2x = 75
x = (75/5.2)
x = (750/52)
x = (375/26) minutes
(375/26)/60
(375/26)/(60/1)
(375/26) * (1/60)
(375/1560)
(75/312)
(25/104)
about .24 hours
2006-09-07 07:48:47 · answer #7 · answered by Sherman81 6 · 0⤊ 0⤋
working burns critically greater energy (greater desirable than two times) in step with minute than walking. So, you will could walk for properly over an hour to burn the comparable energy you will burn in a 30 minute run. Why? because of the fact working demands hence lots greater potential to fireside off the muscle groups at as quickly as, and potential = energy.
2016-09-30 10:46:12 · answer #8 · answered by ? 4 · 0⤊ 0⤋
5∙2 mi = 30 min.
1∙0 mi = 5∙769230769 min.
2∙5 mi = 14∙42307692 min.
14∙42307692 min./60 min. = 0∙240384615 hr.
2006-09-07 07:40:02 · answer #9 · answered by Brenmore 5 · 0⤊ 0⤋
.24 hours which is 14 minutes 24seconds.
2006-09-07 07:27:59 · answer #10 · answered by Anonymous · 0⤊ 0⤋