Two trains of equal length cross a pole in 12 s and 18 s respectively. What is the ratio of their speeds?

Explanation

Given: Two trains of equal length cross a pole in 12 s and 18 s respectively. When a train crosses a pole, the distance covered = length of the train. Since both trains are of equal length, their speeds are inversely proportional to the time taken. Time taken: First train = 12 s Second train = 18 s 1 1 Speed₁ : Speed₂ = ​: ​ 12 18 ​ ​ Multiply both by 36 to simplify: =3:2 So, 3 : 2 is the ratio of their speeds. Thus, correct option is (b).