Yesterday Mansi typed an essay of 5000 words at the speed of 60 words per minute. Today she typed the same essay faster and her speed was 15% more than yesterday. What is the approximate difference in the time she took to type yesterday and the time she took to type today?
A. 20 minutes
B. 30 minutes
C. 10 minutes
D. 40 minutes
Solution(By Examveda Team)
Speed increase from yesterday to today is 15% of 60 is 9Therefore, today speed is 60+9 = 69
Time taken to type 5000 words yesterday is = 5000/60 minute.
Time taken to type 5000 words today is = 5000/69 minute.
Therefore time difference is 5000/69 -5000/60 = 10 minute (approx)
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