Question

60 किलोमीटर प्रति घंटा की चाल से चलते हुए 300 मीटर लंबी रेलगाड़ी एक आदमी को कितनी देर में पार करे जाएगी​

Answer 1

Answer:

18.75 सेकेंड

Step-by-step explanation:

60 किलोमीटर/घंटा

1 घंटा=60 मिनट

$\frac{60}{60} = 1$

1 किलोमीटर/मिनट

1 किलोमीटर=1000 मीटर

1000 मीटर/मिनट

1 मिनट=60 सेकंड

$\frac{1000}{60 } = 16$

$300 \div 16 = 18.75$

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Answer 2

Answer:

18 sec

Concept: In the given question we will use the concept of speed & distance. One more thing that should always remember while solving this type of question is that units of all given quantities will be in the S.I. system where the distance's unit is 'meter' & time will be measured in 'second'.

Given:

Speed of train= 60 km per hour

Distance=300 meter

To find: Time is taken by the train to cross the man.

Solution:

First, we change the speed to meters per second

speed= $\frac{60 km}{1 hour}$= $\frac{60}{1}$×$\frac{1000}{60*60}$ $\frac{m}{sec}$ =$\frac{100}{6} \frac{m}{sec}$

Distance= 300 meter

now by using the formula $Time=\frac{distance}{speed}$

put given values in the formula

$time=\frac{300}{100/6}$

        = $\frac{300*6}{100}$

        = 18 sec

Hence,  the time taken by the train is 18 sec