Question

what is the ratio of height for pq and qr in the figure
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Answer 1

Explanation:

You can use the formula

${v}^{2} - {u}^{2} = 2as$

for PQ use v= u/3, u= u/2 and a=-g

Similarly for QR

use v=u/4, u= u/3 and a=- g

in both cases u have to find s. then divide both of them. you will get the answer