An express traveled at an average speed of 120 km/hr, stopping for 3 min after every 90 kn. How long did it take to reach its destination 600 km from the starting point? Options
A) 5 hrs 21 min	B) 4 hrs 21 min	C) 6 hrs 41 min	D) 5 hrs 15 min	E) 4 hrs 34 min
D   6 hrs 21 min   Time taken to cover 600 km = 600/120= 
<gadget id="calculator">600/120</gadget>
<output>5</output>
5 hrs.   Number of stoppages= 600/90 - 1 = 5   Total time of stoppages = 3 * 5= 
<gadget id="calculator">3 * 5</gadget>
<output>15</output>
15 min   Hence, total time taken= 5 hrs 15 min.
<result>D</result>
An express traveled at an average speed of 120 km/hr, stopping for 3 min after every 90 kn. How long did it take to reach its destination 600 km from the starting point?