The spacecraft takes 45 min to complete 3 revolutions of the orbit of length 10 mi. What is the speed of the aircraft?

30 mph

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40 mph

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45 mph

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50 mph

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Solution

The correct option is B 40 mph
Orbit length = 10 mi
No. of revolutions = 3
Total distance = 3 x 10 = 30 mi
Time for 3 revolutions = 45 min (3/4 h)
Speed = Total distance/ time
= $\frac{30}{3 / 4}$
= 40 mph

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The spacecraft takes 45 min to complete 3 revolutions of the orbit of length 10 mi. What is the speed of the aircraft?

The correct option is B 40 mphOrbit length = 10 mi No. of revolutions = 3 Total distance = 3 x 10 = 30 mi Time for 3 revolutions = 45 min (3/4 h) Speed = Total distance/ time = 303/4 = 40 mph

The correct option is B 40 mph
Orbit length = 10 mi
No. of revolutions = 3
Total distance = 3 x 10 = 30 mi
Time for 3 revolutions = 45 min (3/4 h)
Speed = Total distance/ time
= $\frac{30}{3 / 4}$
= 40 mph