A airplane flies twice as fast as a train which covers 60 miles in 80 minutes. What distance will the airplane cover in 20 minutes? Answers : ( a ) 30 miles (b) 50 miles (c) 35 miles (d) 40 miles
Answers
Answer:
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Given : An aeroplane flies twice as fast as a train which covers 60 miles in 80 minutes.
To Find : What distance (in kilometers) will the aeroplane cover in 20 minutes
Solution:
a train covers 60 miles in 80 minutes
=> train covers distance in 80 minutes = 60 miles
An aeroplane flies twice as fast
=> aeroplane covers distance in 80 minutes = 60 * 2 miles
=> aeroplane covers distance in 80 minutes = 120 miles
=> aeroplane covers distance in 1 minutes = 120/80 miles
=> aeroplane covers distance in 1 minutes = 3/2 miles
=> aeroplane covers distance in 20 minutes = 20 * 3/2 miles
=> aeroplane covers distance in 20 minutes = 30 miles
the aeroplane cover in 20 minutes is 30 miles
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