Q. Two sound sources radiating in phase at a frequency of 450 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find the separation between the two sources.
Q. At 3 P.M. a car is located 20 km south of its starting point. One hour later it is 118 km farther south. After two more hours, it is 9 km south of the original starting point. What is the displacement of the car between 3 P.M. and 6 P.M.?