An express traveled at an average speed of 100 km/hr, stopping for 4 min after every 60 km. How long did it take to reach its destination 600 km from the starting point ?  Pick one:
A) 8 hrs 29 min  B) 6 hrs 28 min  C) 2 hrs 28 min  D) 6 hrs 28 min  E) 6 hrs 36 min
Explanation:   Time taken to cover 600 km = 600/100= 
<gadget id="calculator">600/100</gadget>
<output>6</output>
6 hrs.   Number of stoppages= 600/60 - 1= 
<gadget id="calculator">600/60 - 1</gadget>
<output>9</output>
9   Total time of stoppages= 4 x 9 = 36 min   Hence, total time taken = 6 hrs 36 min.   Answer: 6 hrs 36 min
<result>E</result>
An express traveled at an average speed of 100 km/hr, stopping for 4 min after every 60 km. How long did it take to reach its destination 600 km from the starting point ?