Question

14 ) What is the speed of a train of 80 metre
long train passes a railway station platform of
120 metres length in 20 seconds? 5 80 60
लम्बी ट्रेन की गति क्या होगी, जो 20 सेकण्ड में 120 लम्बे
प्लेटफॉर्म से गुजरती है?
A ) 30 km/hour 1 30 1/2
B) 32 km/hour 1 32 12
O O O C
C) 34 km/hour 1 34 5/2
D) Change in momentum/Time 12​

Answer 1

Answer:

Change in momentum/Time 12

Answer 2

Explanation:

Total distance= length of train + length of platform

I.e 80+120= 200 m but need in kmph so 0.2 km

Time = 20 second but need in hours so 20/(3600)= 1/(180)

Speed = distance / time = 0.2*180= 36 kmph