Question 1115348
A plane takes 6 hours to fly from Vancouver to Toronto, and 5 hours to return back. The wind velocity is 50 kilometers per hour, from Toronto to Vancouver. What is the speed of the airplane?
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"to return back." is redundant.
Just say "to return."
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Not enough info to solve.
Knowing the distance would make it solvable.
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50 km/hr is not a velocity, it's a speed since the direction is not given.
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PS  Wind speed and plane's speed (airspeed) use knots, not km/hr.
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People who don't know the subject matter should not try to author math problems.