If two projectiles are launched at the same moment from 2520 km apart and travel directly towards each other at 432 km per hour and 576 km per hour respectively, how many minutes will it take for them to meet? Choose the correct choice from the following choices
A) 130
B) 135
C) 140
D) 145
E) 150
The projectiles travel a total of 1008 km per hour.   The time to meet is   2520/1008= 
<gadget id="calculator">  2520/1008</gadget>
<output>5/2 = around 2.5</output>
2.5 hours= 150 minutes   The answer is 150.
<result>E</result>
If two projectiles are launched at the same moment from 2520 km apart and travel directly towards each other at 432 km per hour and 576 km per hour respectively, how many minutes will it take for them to meet?