Question 1076199
It is the tangent
tan 42=500/x, if height hasn't changed.
x=500/tan 42=555.31 feet
that is in 2 seconds, so in 1800*2 seconds or 1 hour, divided by 5280 ft/mile, the answer is 378.62 mph
check
60 mph is 88 ft/sec
360 mph is 528 ft/sec
This is comparable.