Question

A person fires a gun in front of hillock situated at a distance of S from the person and hears the echo after 1.5 s. If the speed of sound is 310 ms⁻¹, the value of S is:

Options

• 233.5 m

• 231.5 m

• 230.5 m

• 232.5 m

Answer 1

232.5 m

Explanation:

The sound travels to the hillock and back, so the distance to the hillock is half the total distance.

$$S = \frac{vt}{2}$$

$$= \frac{310 \times 1.5}{2}$$

= 232.5 m