Two buses start from a bus terminal with a speed of 20 km/h at intervals of 10 minutes. What is the speed of a man coming from the opposite direction towards the bus terminal if he meets the buses at interval of 8 minutes?
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
2 (5 km/h)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Let Speed of the man is x kmph.
Distance covered in 10 minutes at 20 kmph = distance
covered in 8 minutes at (20 + x) kmph.
Or, 20×(10/60) = 8/(60(20 + x))
Or, 200 = 160 + 8x
Or, 8x = 40
Hence, x = 5kmph.
