Problema Solution
While training for a marathon, Kristin Woods jogged 7 ¾ miles per hour for 2 and 2/3 hours. How many miles did Kristin jog?
Answer provided by our tutors
let
v = 7 3/4 mph = (7*4 + 3)/4 mph the speed of Kristin Woods
t = 2 2/3 h = (2*3 + 2)/3 h the time of the run
d = ?
since speed = total distance/time we have
v = d/t multiply both sided by t
d = v*t
d = ((7*4 + 3)/4)*((2*3 + 2)/3)
by solving we find
d = 62/3 mi
d = 20 2/3 mi
d = 20.67 mi
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Kristin jogged for 20.67 miles.