An express train travelled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point?
Choose the correct choice from the following answers
A) 5 hrs 20 min
B) 6 hrs 21 min
C) 6 hrs 24 min
D) 6 hrs 30 min
E) None
Sol.   Time taken to cover 600 km = (600 / 100)= 
<gadget id="calculator">(600 / 100)</gadget>
<output>6</output>
6 hrs.   Number of stoppages= 600 / 75 - 1 = 8 -1= 
<gadget id="calculator">8 -1</gadget>
<output>7</output>
7.   Total time of stoppages= (3x7) min = 21 min.   Hence, total time taken = 6 hrs 21 min.   Answer 6 hrs 21 min
<result>B</result>
An express train travelled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point?