Answer:
t = 1.5 hours
Explanation:
Given that,
Speed of an airplane, v = 560 miles per hour
Distance, d = 840 miles
We need to find the time taken to cover a distance of 840 miles.
[tex]v=\drac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{840}{560}\\\\t=1.5\ h[/tex]
So, the required time is 1.5 hours.