Two friends A and B are running on a circular track of perimeter equal to 40 m. At time t = 0they are at same location running in the same direction. A is running slowly at a uniform speed of 4.5 km//hr whereas B is running swiftly at a speed of18 km//hr. (a) At what time t_(0) the two friends will meet again? (b) What is average velocity of A and B for the interval t = 0 to t = t_(0)?

Two friends A and B are running on a circular track of perimeter equal

1.	Two friends A and B are running on a circular track of perimeter equal to 40 m. At time t = 0they are at same location running in the same direction. A is running slowly at a uniform speed of 4.5 km//hr whereas B is running swiftly at a speed of18 km//hr. (a) At what time t_(0) the two friends will meet again? (b) What is average velocity of A and B for the interval t = 0 to t = t_(0)?
Answer» Answer :(a) `t_(0) = (32)/(3)s`; (B) `lt V_(A) GT = lt V_(B) gt = (15sqrt(3))/(8pi) m//s`