Question 1 Report
A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air
The velocity of sound in air can be calculated using the formula: velocity = distance / time In this case, the distance travelled by the sound is twice the distance from the man to the wall, since the sound has to travel to the wall and back. So, the distance travelled by the sound is: 2 x 300m = 600m The time taken for the sound to travel this distance (to the wall and back) is: 1.8s So, using the formula: velocity = distance / time velocity = 600m / 1.8s velocity = 333.3ms-1 Therefore, the velocity of sound in air is 333.3ms-1. Hence, the correct option is ii. 333.3ms-1.