Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in oppositedirection with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travellin

1.	Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in oppositedirection with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
A.	1.0
B.	1.2
C.	1.5
D.	2.0
Answer» B. 1.2