SATHEE: Kinematics Question 353

Kinematics Question 353

Question: Three elephants A, B and C are moving along a straight line with constant speed in same direction . Speed of a is $5 m / s$ and speed of c is 10 m/s. Initially separation between A and b is ’d’ and between B and c is also. When ‘B’ catches ‘C’ separation between A and C becomes 3d. Then the speed of B will be

Options:

A) $7.5 m / s$

B) $15 m / s$

C) $20 m / s$

D) $5 m / s$

Show Answer

Answer:

Correct Answer: B

Solution:

B catches C in time t then $t= \frac{d}{u - 10}$ . Separation by this time has increased by ’d’ between A and C hence $(10 - 5) \times \frac{d}{(u - 10)} = d, u = 15 m / s$

Kinematics Question 353

Options:

Answer:

Solution:

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Kinematics Question 353

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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