SOLUTION: Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first lap. The second lap took 25% longer than the first lap. The third lap took 20% longer than the

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Question 261181: Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first
lap. The second lap took 25% longer than the first lap. The third lap took 20%
longer than the second lap. The final lap took 50% longer than the third. What was
Mary’s total walking time for the 4 laps?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first
lap. The second lap took 25% longer than the first lap. The third lap took 20%
longer than the second lap. The final lap took 50% longer than the third. What was
Mary’s total walking time for the 4 laps?
First lap is 4 mins.
Second lap = 25/100*4 +4 =5
Third lap= 20/100*5 + 5 =6
Fourth lap = 50/100*6 +6= 9
The total time taken for all the laps = 5+6+9= 20 mins
M ananth ---------- mananth@hotmail.com