new trains start from the same station at 11 p.m. in opposite directions at speed of 72 km per hour and 62 km per hour respectively. What time they will be 810km apart
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Here's the answer :
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TWO trains start from the same station at 11 p.m. in opposite directions at speed of 72 km per hour and 62 km per hour respectively. What time they will be 810km apart
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Given,
Two trains start from same station(say A) and travel in Opposite directions.
<-----Train1-------- (A) -----Train2---------->
<------72kmph--- (A) ----- 63kmph ------>
<------------------- 11pm ----------------------->
Relative Speed = 72 kmph + 63 kmph
= 135 kmph
Time = Distance / Speed
After what time (t = ?), Distance = 810 km
=> Time = 810 (km)/135 (kmph) = 6
•°• After 6 Hours, the distance between the two trains will be 810 km apart.
After 6 Hours from the start time viz 11 pm + 6 hours = 5 am, they wild be 810 km apart
•°• Required Time = 5 am
•°•°•°•°•°<><><<><>><><>°•°•°•°•°•°•
Here's the answer :
***
TWO trains start from the same station at 11 p.m. in opposite directions at speed of 72 km per hour and 62 km per hour respectively. What time they will be 810km apart
•°•°•°•°•°<><><<><>><><>°•°•°•°•°•°•
Given,
Two trains start from same station(say A) and travel in Opposite directions.
<-----Train1-------- (A) -----Train2---------->
<------72kmph--- (A) ----- 63kmph ------>
<------------------- 11pm ----------------------->
Relative Speed = 72 kmph + 63 kmph
= 135 kmph
Time = Distance / Speed
After what time (t = ?), Distance = 810 km
=> Time = 810 (km)/135 (kmph) = 6
•°• After 6 Hours, the distance between the two trains will be 810 km apart.
After 6 Hours from the start time viz 11 pm + 6 hours = 5 am, they wild be 810 km apart
•°• Required Time = 5 am
•°•°•°•°•°<><><<><>><><>°•°•°•°•°•°•
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