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ചലിക്കുന്ന ട്രെയിൻ 50 മീറ്റർ നീളമുള്ള പ്ലാറ്റ്‌ഫോമിനെ 14 സെക്കൻഡിലും ഒരു വിളക്ക് തൂണിനെ 10 സെക്കൻഡിനുള്ളിലും കടന്നുപോകുന്നു. ട്രെയിനിൻ്റെ വേഗത (കിലോമീറ്റർ/മണിക്കൂറിൽ) എത്രയാണ്

A24

B36

C40

D45

Answer:

D. 45

Read Explanation:

ട്രെയിനിന്റെ നീളം x ആയാൽ (x + 50)/14 = x /10 10x + 500 = 14x x = 500/4 = 125 ട്രെയിനിന്റെ വേഗത = 125/10 = 12.5m/s = 12.5 x 18/5 = 45 km/hr


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