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A train of length L is traveling at a constant velocity and passes a pole in t seconds. If the same train traveling at the same velocity passes a platform in 3t seconds then what is the length of the platform?
A. 0.5 L
B. L
C. 1.5 L
D. 2 L
E. 3 L
The OA is D.
let r=rate
let p=length of platform
L+p=(3t)(r)=3rt
(L+p)/3=rt
L=rt
(L+p)/3=L
L+p=3L
p=2L
What do you think about the above solution? Could someone gives another approach, please? Thanks!
A. 0.5 L
B. L
C. 1.5 L
D. 2 L
E. 3 L
The OA is D.
let r=rate
let p=length of platform
L+p=(3t)(r)=3rt
(L+p)/3=rt
L=rt
(L+p)/3=L
L+p=3L
p=2L
What do you think about the above solution? Could someone gives another approach, please? Thanks!
