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Maths Puzzle
Numerical Ability
An airplane flew for 4 hours with a 20-km/h tail wind. The return flight against the same wind took 5 hours. Find the speed of the plane in still air.
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- let speed of plane=x
according to situation
4(X+20)=5(X-20)
x=180 - 9 years agoHelpfull: Yes(0) No(0)
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