Question

please give me please give me right answer with explainright answer with explain

Answer 1

Answer:

it will be option c

4:9

give thanks

Answer 2

Answer:

ratio of sound A and B = 9:16

here amplitude of sound A is doubled and amplitude of sound B is half so,

amplitude of sound A = 9×2 = 18

amplitude of sound B = $\frac{16}{2}$ = 8

so, 18:8

hence,

18:8 = $\frac{18}{8}$

        = $\frac{9}{4}$

hence, 4:9