If two projectiles are launched at the same moment from 1320 miles apart and travel directly towards each other at 480

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If two projectiles are launched at the same moment from 1320 miles apart and travel directly towards each other at 480 miles per hour and 510 miles per hour, respectively, how many minutes will it take for them to meet?

A. 40
B. 44
C. 80
D. 88
E. 90

Answer: C

Source: Princeton Review