Two trains P and Q are moving in opposite direction at a rate of 36km/hr and 45km/hr respectively. A passenger is sitting in train P, finds that his train passes train Q in 8 seconds. What is the length of train Q?
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
3 (180m)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
As the trains travel in opposite direction then
Relative speed = (45 + 36)km/hr.
= 81 km/hr.
= (81 × 1000)/3600
= 45/2
The length of train Q = (45/2) × 8 = 180 m
