exam Maths Puzzle Numerical Ability

Find the acute angle A if tan A=1.82402

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exam Other Question

A ball is thrown upward from the roof of a building 100 m tal with an initial velocity of 20 m/s. When will the ball reach a height of 80 m? area of 2 regular hexagons are 54 square root of 3 & 150 square root of 3, what is the ratio of their perimeters?