Problema Solution
Torrin rode his bike to school at 13.5km/h. He returned home using the same route at 10.5km/h. Torrin took a total of 36 min to ride to school and back. How many minutes did Torrin take to ride to school?
Answer provided by our tutors
let
v1 = 13.5 km/h the speed to school
v2 = 10.5 km the speed returning home
t = the time of the ride to school in minutes
36 - t = the time of the ride from school in minutes
since distance = speed*time
v1*(t/60) = v2*(36 - t)/60
13.5*(t/60) = 10.5*(36 - t)/60
by solving we find
t = 15.75 min
t = 16 min approximately
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Torin needs 16 min to get to school.