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A takes 40 second to cover the circumference of the park.
Therefore, in 15 seconds, he will cover 15/40 of the circumference.
Let the circumference be c.
Then, in 15 seconds, A will cover 15c/40.
B travels in the opposite direction and meets A after 14 secs. Therefore distance covered by B = c - 15c/40 = 25c/40.
B takes 15 seconds to travel 25c/40.
By unitary method,
To travel c distance, B will take 15 × 40/25 = 24 seconds.
Therefore, in 15 seconds, he will cover 15/40 of the circumference.
Let the circumference be c.
Then, in 15 seconds, A will cover 15c/40.
B travels in the opposite direction and meets A after 14 secs. Therefore distance covered by B = c - 15c/40 = 25c/40.
B takes 15 seconds to travel 25c/40.
By unitary method,
To travel c distance, B will take 15 × 40/25 = 24 seconds.
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