Kendra rides her bike to school each day. It takes her 10 minutes to ride 30 blocks. What unit rate would express the speed of Kendra's bike ride?
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Answer:
Average speed of Deepa =30 kmph
Time taken to reach the destination =6 hours
So, total distance of destination =6×30=180 km
Time taken to covered 180 km by Hema =4 hours
Speed of Hema =
4
180
=45 kmph
Deepa's new average speed =30+10=40 kmph
Time taken =
40
180
=4.5 hrs
Hema's new average speed =45+5=50 kmph
Time taken by Hema =
50
180
=3.6 hours
Time difference =4.5−3.6=0.9 hours =0.9×60=54 minutes.
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