In a kilometer race, A beats B by 25 seconds and B beats C by 15 seconds. If A beats C by 160 m, then the time taken by A to run 1 kilometer is :
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 210 seconds
Distance covered by C = Speed of A × $t_A$
$=\frac{1000}{t_A+40}×t_A=840$
$⇒1000t_A=840(t_A+40)$
$⇒t_A=\frac{33600}{840}=210$