MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12th pass
        
A 100m long train crosses a man travelling at 5km per hour in opposite direction in 7.2 seconds then velocity of train is?
one year ago

Answers : (1)

Arun
24739 Points
							
Let the speed of the train  = x

Since the man and the train are moving in opposite direction'
The relative speed = (5 + x) km/h

Time taken to overtake the man is the time required to cover a distance of 100m (the length of the train)

100 m = 0.1km and 7.2 seconds = 7.2/3600 = 0.002 hours
 
 
Time = Distance/Speed

Time = 0.1/(x + 5) = 0.002

 x +5 = 0.1/0.002 = 50
 
x = 50 -5
x = 45
 
The speed of the train =  45km/h
Regards
Arun (AskIITans forum expert)
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details