Question

two particles start moving from same positionon a circle of radius 20cm with speed 40pi m/s and 36pi m/s resp in same dirn . find the time after which the particles will meet again ?​

Answer 1

Answer:

Find there relative speed

= 40π - 36π = 4π m/s

Now they will meet when there relative speed will complete a round or travelled 2πr = 2π(1/5) m

So time = d / v

$= \frac{ \frac{2\pi}{5} }{4\pi} = \frac{1}{10} s$