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Exercise 12 (B) Question 3 - Selina Mathematic Class 6 – Idea of Speed

Manoj Agarwal September 16, 2023 0

Exercise 12 (B) Question 3 - Selina Mathematic Class 6 – Idea of Speed, Distance & Time. Problem 3: A train 120 m long passes a railway platform 160 m long in 14 sec. How long will it take to pass another platform which is 100 m long?

Selina concise maths solution

Given

A train $120$ m long passes a railway platform $160$ m long in $14$ seconds

$D i s t a n c e = 120 m + 160 m$

$= 280 m$

$T i m e = 14$ sec

Hence,

Speed = Distance / time

$= 280 / 14$

$= 20 m / s e c$

Hence, the speed of train is $20 m / s e c$

Now, time taken by the train to pass $100$ m platform is as follows

Distance $= 120 m + 100 m$

$= 220 m$

Speed $= 20 m / s e c$

Time $= 220 m / 20 m / s e c$

We get,

$= 11 s e c$

Hence, the time taken by the train to pass the $100$ m platform is $11$ sec

Exercise 12 (B) Question 3 - Selina Mathematic Class 6 – Idea of Speed, Distance & Time. Problem 3: A train 120 m long passes a railway platform 160 m long in 14 sec. How long will it take to pass another platform which is 100 m long? Selina concise maths solution

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ICSE Selina concise maths solution Class 6 ICSE Selina Math Class 6 Chapter12

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