Subject :NSO Class : Class 10
Two men, A and B, are facing a flat and hard wall as shown in the given figure. When man A makes a clap, man B hears two claps. The speed of sound in air is 320 m s-1. What is the interval between the two claps heard by man B?
A2.14 s
B2.78 s
C3.16 s
D3.75 s