Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per
hour. How many hours will it take for the planes to be 2451 miles apart?
1 answer:
plane 1 travels 395 miles in 1 hour
plane 2 travels 422 miles in 1 hour
together, they travel (395+422) 817 miles in 1 hour
to have 2451 miles between then, they'd need to travel
so in 3 hours, they'll be 2451 miles apart
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