A person claps near a cliff and hears the echo after 6 s. If the speed of sound is 346 m/s, how far is the cliff from the person?

1. Sound travels to the cliff and back, so total distance = v × t = 346 × 6 = 2076 m. 2. This is twice the cliff distance. 3. Cliff distance = 2076 / 2 = 1038 m. _Source: RRB Group D CEN-02/2018 PYQ, Q.3._