exam Maths Puzzle Numerical Ability

can u please help me with this storyproblem

during the first 10 minutes of flight, a jet plane climbs from ground level to an altitude of about 25000feet. what is the jet planes

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exam Other Question

A car radiator has a 6 liter capacity. If the liquid in the radiator is 40% antifreeze, how much liquid must be replaced with pure antifreeze to bring the mixture up to a 50% solu at 10:00am a car leaves a house at a rate of 60mi/h. at the same time, another car leaves the same house at a rate of 50mi/h in the opposite direction. at what time will the cars be 330 miles apart?