exam Maths Puzzle Numerical Ability

What is x squared plus x squared?

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A Boeing 747 has been instructed to climb from its present altitude of 8000
ft to a cruising altitude of 29, 000 ft. If the plane ascends at a rate of 3500 ft/min, how
long will need help please, the product of 2 and the second power of y, the answer came up with is y2 x 2. is that correct?