A 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 22 min  B) 6 hrs 21 min  C) 7 hrs 14 min  D) 6 hrs  E) None of these
Explanation:   Time taken to travel 600 km = Distance/Speed =600/100= 
<gadget id="calculator">600/100</gadget>
<output>6</output>
6 hour   Now we need to find out the number of stops in the 600 km travel.   Given that train stops after every 75 km.   600/75= 
<gadget id="calculator">600/75</gadget>
<output>8</output>
8   It means train stops 7 times before 600 km and 1 time just after 600 km. Hence we need   to take only 7 stops into consideration for the 600 km travel.   Hence, total stopping time in the 600 km travel= 7 x 3 = 21 minutes   Total time needed to reach the destination = 6 hours + 21 minutes = 6 hrs 21 min   Answer: Option 6 hrs 21 min
<result>B</result>
A 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?