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Answer :
Answer: it takes 5s for each plane to travel their respective distances
Step-by-step explanation:
Let a = speed of plane A
Let b = speed of plane B
b = 55 + a
Time for plane A to fly 4000 miles
= 4000/a
Time for plane B to fly 4275 miles
= 4275/b
Since it takes same amount of time
4000/a = 4275/b
4000b = 4275a-------1
Put b = 55+a in eqn
4000(55+a) = 4275a
220000+4000a = 4275a
275a = 220000
a = 800
b = 55 +800 = 855
Time for plane A to fly 4000 miles
= 4000/800 = 5s
Time for plane B to fly 4275 miles
= 4275/855= 5s
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