If two projectiles are launched at the same moment from 1386 km apart and travel directly towards each other at 445 km per hour and 545 km per hour respectively, how many minutes will it take for them to meet?	Choose the correct answer
A) 80  B) 82  C) 84  D) 86  E) 88
The projectiles travel a total of 990 km per hour.   The time to meet is   1386/990= 
<gadget id="calculator">  1386/990</gadget>
<output>7/5 = around 1.4</output>
1.4 hours= 84 minutes   The answer is 84.
<result>C</result>
If two projectiles are launched at the same moment from 1386 km apart and travel directly towards each other at 445 km per hour and 545 km per hour respectively, how many minutes will it take for them to meet?