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three elephants A,B,C are moving along a straight line with constant speed in same direction as shown in figure. Speed of A is 5 m/s and speed of C is 10 m/s . Initial separation between A and B is d and between B and C is also d. when B catches C separation between A and C becomes 3d. find speed of B.

three elephants A,B,C are moving along a straight line with constant speed in same direction as shown in figure. Speed of A is 5 m/s and speed of C is 10 m/s . Initial separation between A and B is d and between B and C is also d. when B catches C separation between A and C becomes 3d. find speed of B.
 

Grade:12th pass

2 Answers

aswath
19 Points
6 years ago
The velocity with which the b elephant moves is 15m/s.This is because the velocity with which the mid elephant should be more than the other two as it is able to cope up with the elephant in the lead while leaving behind the last elephant behind at a huge gap.
 
Anita goyal
15 Points
5 years ago
Initial separation between a and c 2d now it becomes 3d = displacement = d relative velocity of c with respect to a is 5 m/s which emplies time = d/5. Now relative velocity of b with respect to c is u -10 m/s the relative distance = d time would Same that is d/5=d/(u-10) 
From here u = 15 m/s
Thanks 
I hope answer is helpful for u all guys …
Manika 
A dreaming student

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