Question 317724: When Dave walks to school, he averages 90 steps per minute, each of his steps are 75 cm long. It takes him 16 minutes to get to school. His brother, Jack, going to school by the same route,averages 100 steps per minute, but his steps are only 60 cm long. How long does it take Jack to get to school?
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website! dave takes 90 steps /minute , length of each step = 75 cm, walks for 16 minutes
Total distance walked = 16*75*90=108 000 cm
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jack takes 100 steps of 60 cm each = 6000 cm /minute
distance = 108 000 cm
rate = 6000 steps/minute
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distance / rate = time
108 000 / 6000
=18 minutes
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