1.

he height and the distance x along therizontal plane of a projectile on a cetainlane (with no surrounding atmosphere) aregiven by y 8t -5t2 metre and x 6tmetre, where t is in second. The velocitywith which the projectile is projected, is :-(1) 14 ms-I(2) 10 ms-1(3) 8 ms-1(4) 6 ms-1

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