Problema Solution
from a common starting position, Willy and jessica ride their bikes in opposite directions.Willy rides 2km per hour faster than jessica.in 3 hours,the two are 60km apart.find the average speed of each one?
Answer provided by our tutors
Let jessica's rate be x km/h
Then willy's rate is x+2 km/h
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They are separating at a combined rate of 2x+2 km/h
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Equation:
time*rate = distance
3*(2x+2) = 60
2x+2 = 20
2x = 18
x = 9 km/h (Jessica's rate)
x+2 = 11 km/h (Willy's rate)