A boy whistles once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 50C .If the speed of sound = (331.5m/s at 00c) the speed in air increases at about 0.6 m/s per 0C,
- Determine the distance travelled by sound.
- Determine the speed travelled at 50C.
- Calculate the time taken for the boy to hear the echo