An express traveled at an average speed of 120 km/hr, stopping for 4 min after every 85 kn. How long did it take to reach its destination 8400 km from the starting point?
Pick one:
A) 5 hrs 21 min
B) 4 hrs 21 min
C) 6 hrs 41 min
D) 7 hrs 32 min
E) 4 hrs 34 min
D   7 hrs 32 min   Time taken to cover 840 km = 840/120= 
<gadget id="calculator">840/120</gadget>
<output>7</output>
7 hrs.   Number of stoppages= 840/85 - 1 = 8   Total time of stoppages = 4 * 8= 
<gadget id="calculator">4 * 8</gadget>
<output>32</output>
32 min   Hence, total time taken= 7 hrs 32 min.
<result>D</result>
An express traveled at an average speed of 120 km/hr, stopping for 4 min after every 85 kn. How long did it take to reach its destination 8400 km from the starting point?