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Total distance = 50 km
Distance travelled using the bike =(20 x 3/2) km
= 30 km
Remain distance = (50 – 30)km
=20 km
Time taken =1 ½ + (20/2)
= 11 ½ hrs
Average speed = 50 /(11 ½ )
= 4.35 km /h
joseph rimiru answered the question on October 10, 2017 at 14:00
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