Question

the height y and the distance x along the horizontal plane, of a projectile on a certain (with surrounding atmosphere) are given by y =[ 5t-8t^2] metre and x=12t metre where t is the time in second . the velocity with which the projectile is projected,is
a) 5m/s
b)12 m/s
c)13 m/s
d)none

Answer 1

answer is 11m/s

so the option is d)none

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