Yesterday Priti types an essay of 5000 words at the speed of 60 words per minute. Today she types the same 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?
(1) 20 minutes
(2) 30 minutes
(3) 10 minutes
(4) 40 minutes
(5) 1 hour

• Yesterday Time Taken = 5000/60 = 83.3 (APPROXIMATELY)
  Today Typing Speed per Minute = 60*(115/100) = 69(By Solving)
  Now Time Taken = 5000/69 = 72.3 (APPROXIMATELY)
  So, Difference In Time is 83.3-72.3 = 11 which is APPROXIMATELY 10 (OPTION 3 is answer)
  
• 11 years agoHelpfull: Yes(2) No(0)