JustANormalDude JustANormalDude

23-03-2017
Mathematics

contestada

It took Mary 1.5 hours to bicycle 39km. Then she slowed down and took another 3 hours to bicycle 51 km more. Find her average speed for the trip

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texaschic101 texaschic101

23-03-2017

average speed = (total distance) / (total time)

average speed = (39 + 51) / (1.5 + 3)
= 90 / 4.5
= 20 km per hr <==

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