Question

A searchlight rotates through one complete revolution every 52 seconds how long does it take to rotate 90 degrees?

Answer 1

Time taken to rotate 90° is 13 seconds

Explanation:

Given:

To complete one revolution, the searchlight takes 52 seconds

One revolution = 360°

So,

360° is completed in 52 seconds

Time taken to complete 90° is $\frac{52}{360} X 90$

                                            = 13 sec

Therefore, time taken to rotate 90° is 13 seconds