Three balls of same masses are projected with equal speeds at angle 15°,45°,75°, and their ranges are respectively R1, R2 andR3 , then

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R1 > R2 > R3

R1 < R2 < R3

R1 = R2 = R3

R1 = R3 < R2

answer is D.

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Detailed Solution

At 45°, range is maximum. At 15° and 75°, ranges are equal.As, Rθ = R900 - θ ∵ R150 = R750 < R450 ⇒ R1 = R3 < R2

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