Two train, each 700 meters long, are moving in opposite directions at speeds of 45 km/h and 55 km/h. How long will it take for the train to completely pass each other?
Two train, each 700 meters long, are moving in opposite directions at speeds of 45 km/h and 55 km/h. How long will it take for the train to completely pass each other?
दो रेलगाड़ियाँ, जिनमें से प्रत्येक 700 मीटर लंबी है, 45 किमी/घंटे और 55 किमी/घंटे की गति से विपरीत दिशाओं में चल रही हैं। रेलगाड़ियों को एक -दूसरे को पूरी तरह से पार करने में कितना समय लगेगा?
Detailed Solution & Logic
Correct Answer:
50 seconds
Time = समय
distance = दूरी
total distance / कुल दूरी = 700 + 700 = 1400 m
सापेक्ष गति / relative speed = 45 +55 = 100 km/h
=$ 100 \times \frac{15}{18} =27.78$ m/s
Time = distance $ \div $ speed
= $ \frac{1400}{27.78} = 50 $ seconds
Similar Practice Questions
Which of the following is the effective annual rate of interest corresponding to a compound interest rate of 9% per annum compounded half – yearly?
Which of the following is the effective annual rate of interest corresponding to a compound...
Find the average of 300, 129, 49, 120 and 102.
Find the average of 300, 129, 49, 120 and 102. 300, 129, 49, 120 और...
If 7A = 6B = 12C, What is A : B : C ?
If 7A = 6B = 12C, What is A : B : C ? यदि...
A 15% drop in the price of sugar allows a customer to purchase 2 kg more for ₹272. What is the new price of sugar per kg?
A 15% drop in the price of sugar allows a customer to purchase 2 kg...
The marked price of a watch is ₹6,420, which is available at a discount of 17%. Find the amount paid by the customer to purchase the watch.
The marked price of a watch is ₹6,420, which is available at a discount of...
Manpreet offers two successive discounts of 12%
Manpreet offers two successive discounts of 12% and 8% on the sale of a sweater...
A number is first decreased by 15% and then increased by 20%. The number so obtained is 78 more than the original number. The original number is:
A number is first decreased by 15% and then increased by 20%. The number so...