Assertion : Range of projectile of projection of a body is made n times . Its time of fights becomes n times .
Reason Range of jprojectile does not depend on the initial velocity of a body .

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reson are false.

Answer

C

Explanation

As time of flight ,
`T = (2 u sin theta)/( g) therefore T' = (2 (nu) sin theta)/(g) = nT`
But range
`R = (u^(2) sin 2 theta)/(g) therefore R' = (n^(2) u^(2) sin 2 theta)/(g) = n^(2) R`.