Sure, here's how you can solve this problem:

Step 1: First, we need to find the relative speed of the two trains. Since they are moving in opposite directions, we add their speeds. So, the relative speed is 80 km/h + 64 km/h = 144 km/h.

Step 2: We need to convert this speed into m/s because the lengths of the trains are given in km and we want the time in seconds. We know that 1 km/h = 5/18 m/s. So, 144 km/h = 144 * (5/18) = 40 m/s.

Step 3: Now, we find the total length of the two trains which is 2.1 km + 1.9 km = 4 km = 4000 m (since 1 km = 1000 m).

Step 4: Finally, we find the time taken by the slower train to cross the faster train. We know that time = distance/speed. So, the time taken is 4000 m / 40 m/s = 100 seconds.

So, the slower train takes 100 seconds to cross the faster train.

Question

Sure, here's how you can solve this problem:

Step 1: First, we need to find the relative speed of the two trains. Since they are moving in opposite directions, we add their speeds. So, the relative speed is 80 km/h + 64 km/h = 144 km/h.

Step 2: We need to convert this speed into m/s because the lengths of the trains are given in km and we want the time in seconds. We know that 1 km/h = 5/18 m/s. So, 144 km/h = 144 * (5/18) = 40 m/s.

Step 3: Now, we find the total length of the two trains which is 2.1 km + 1.9 km = 4 km = 4000 m (since 1 km = 1000 m).

Step 4: Finally, we find the time taken by the slower train to cross the faster train. We know that time = distance/speed. So, the time taken is 4000 m / 40 m/s = 100 seconds.

So, the slower train takes 100 seconds to cross the faster train.

Knowee AI · Accepted Answer

Sure, here's how you can solve this problem:

Step 1: First, we need to find the relative speed of the two trains. Since they are moving in opposite directions, we add their speeds. So, the relative speed is 80 km/h + 64 km/h = 144 km/h.

Step 2: We need to convert this speed into m/s because the lengths of the trains are given in km and we want the time in seconds. We know that 1 km/h = 5/18 m/s. So, 144 km/h = 144 * (5/18) = 40 m/s.

Step 3: Now, we find the total length of the two trains which is 2.1 km + 1.9 km = 4 km = 4000 m (since 1 km = 1000 m).

Step 4: Finally, we find the time taken by the slower train to cross the faster train. We know that time = distance/speed. So, the time taken is 4000 m / 40 m/s = 100 seconds.

So, the slower train takes 100 seconds to cross the faster train.

Two trains are moving in opposite directions at 80 km/h and 64 km/h. Their lengths are 2.1 km and 1.9 km respectively. What is the time taken by the slower train to cross the faster train (in seconds)?

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