1.

Two particles start moving from same position on a circle of radius 20 cm with speed40π23.m/s and 36π m/s respectively in the same direction. Find the time after which theparticles will meet again.

Answer»

Relative speed = 40π - 36π = 4π m/sec

Circumference of the circle = 2π * 20 = 40π cm =0.4π m

Time after which they again meet = 0.4π / 4π = 0.1 sec



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