A train of 110m moving at a speed of 90 km/hr. How long will it take to cross a platform 90 m long.A8 secB12 secC15 secD18 secAnswer: A. 8 secRead Explanation:Speed = 90 km/hr = 90 x 5/18= 25 m/s time= distance/speed distance=110 + 90 = 200 m = 200/25 = 8 secOpen explanation in App