Question

Kanyakumari Express is a daily train from Kashmir to Kanyakumari. The train leaves Kashmir at 11 a.m. everyday and reaches Kanyakumari after exactly 10 days at 11 a.m. Kashmir Express is a similar daily train which leaves Kanyakumari at 11 a.m. everyday and reaches Kashmir after exactly 10 days at 11 a.m. Let us say, you are on the train which is leaving Kashmir on 20th April. When you reach Kanyakumari on 30th April, how many Kashmir Express trains would have crossed you from the opposite direction?

a) 19
b) 10
c) 9
d) None of these

Answer 1

Answer:

When you reach Kanyakumari on 30th April, 19 Kashmir Express trains would have crossed you from the opposite direction.

Frankly based on the given question the correct answer option is (a) 19

Explanation:

Luckily the total journey time from Kashmir to Kanyakumari is 10 days. So, when the train leaves on April 20th it will reach Kanyakumari on April 30th, which means it has traveled for 10 days.

Now let's consider the Kashmir Express train that leaves Kanyakumari on April 20th. It will also travel for 10 days and reach Kashmir on April 30th.

Therefore any Kashmir Express trains that depart after April 20th from Kanyakumari and before April 30th from Kashmir will cross the Kanyakumari Express.

The time between April 20th and April 30th is 10 days so a total of 11 Kashmir Express trains will leave Kanyakumari during this period (including the one that leaves on April 20th), and all of them will cross the Kanyakumari Express.

Therefore the correct answer is (a) 19.

Learn more about train, visit: https://brainly.in/question/914935

Learn more about journey, visit: https://brainly.in/question/13721636

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Answer 2

When we reach Kanyakumari on April 30, (a) 19 Kashmir Express trains will have crossed us from the opposite direction.

An explanation of it is given below:

• The journey from Kanyakumari to Kashmir and vice versa takes 10 days.
• When our train, the Kanyakumari Express, leaves Kashmir on April 20 at 11 a.m., it will reach Kanyakumari on April 30 at 11 a.m.
• To calculate how many Kashmir Expresses we will cross, we need to take into consideration how many Kashmir Expresses will leave in these 10 days and how many will cross the Kanyakumari Express.
• We get a total of 10 Kashmir Express trains that will cross the Kanyakumari Express. Since the train will reach Kanyakumari on April 30th, we don’t need to take it into consideration.
• Now, we need to focus on how many trains that left Kanyakumari before the 20th of April will cross the Kanyakumari Express leaving on the 20th.
• From the 11th of April to the 19th of April, a total of 9 Kashmir Expresses will cross our train.
• Hence, a total of 10 plus 9 equals 19 Kashmir Express trains will cross the Kanyakumari Express.

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