Aspire's Library
A Place for Latest Exam wise Questions, Videos, Previous Year Papers,
Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. The length of the train is:
Solution
Let trainspeed $= V$ kmph,
length $= L$ metres
Equation 1 (passes 2 kmph walker in 9s):
$$L = (V-2) \times \frac{5}{18} \times 9$$
Equation 2 (passes 4 kmph walker in 10s):
$$L = (V-4) \times \frac{5}{18} \times 10$$
Equating both:
$$45(V-2) = 50(V-4)$$
$$45V - 90 = 50V - 200 \Rightarrow V = 22 \text{ kmph}$$
Length:
$$L = (22-2) \times \frac{5}{2} = \boxed{50 \text{ metres}}$$
Online Test Series, Information About Examination,
Syllabus, Notification
and More.
View More
Online Test Series, Information About Examination,
Syllabus, Notification
and More.
View More
Ask Your Question or Put Your Review.
