প্রশ্ন সংশোধন করুন
প্রশ্ন:
Length of a train is 170 meters and speed of train is 63 km / hr . This train can pass a bridge in 30 seconds , then find the length of the bridge.
Length of a train is 170 meters and speed of train is 63 km / hr . This train can pass a bridge in 30 seconds , then find the length of the bridge.