KVPY2013MathematicsBasics of Mathematics
A person X is running around a circular track completing one round every 40 seconds. Another person Y running in the opposite direction meets X every 15 second. The time, expressed in seconds, taken by Y to complete one round is
Options
- A12.5
- B24
- C25
- D55
Correct answer
B. 24
Step-by-step solution
= 2 40 15=2 - 2 n 15 3 8 =1- 15 n n =24