Question

plz solve this question​

Answer 1

K=root hg/n^2-a^2

4 =root 2×g/(1.6)^2-3^2

=16=2g/2.56-9

=16=2g-23.04/2.56

=40.96=2g-23.04

=17.92=2g

=g=8.46