Question

Please answer this question.
Read the question carefully.

Std: 9th
Subject: Science and technology ​

Answer 1

Answer:

Answer is 0.5 s

Explanation:

Time period is the reciprocal of frequency. Hence, T=1/f = 1/(20 Hz) = 0.05 secs.

Answer 2

Answer:

c is the write answer

Explanation:

time period is reciprocal of frequency

so,

option c is correct.

time= 1/20 seconds