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Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart?
Verified Answer
Two cyclists start from the same place in opposite directions one goes...
two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart
let first one goes x distance
second one goes x-47.5 distance
D = S * T
x 18
x-47.5 20
47.5
x/18=x-47.5/20 because time is same
x=475
but answer is wrong please explain me detail where i did wrong
This question is part of UPSC exam. View all Class 8 courses
Most Upvoted Answer
Two cyclists start from the same place in opposite directions one goes...
We can do this question by relative motion
Lets consider A going to north(+ve) and B going to south(-ve)
so Speed of A w.r.t B= S of A - S of B
=18 - (-20)
Therefor Relative Speed= 38 km/hr
now s= u.t
47.5=38.t
t=1.25 hr
Hope you Understood
Community Answer
Two cyclists start from the same place in opposite directions one goes...
Distance between the cyclists
- The cyclists are moving away from each other at a combined speed of 18 kmph + 20 kmph = 38 kmph.
- To find the time taken to be 47.5 km apart, we can use the formula: time = distance/speed.
Calculating the time taken
- Let's assume the time taken for the cyclists to be 47.5 km apart is T hours.
- The distance covered by the cyclist going north in T hours = 18T km.
- The distance covered by the cyclist going south in T hours = 20T km.
- As they are moving in opposite directions, the sum of their distances should be equal to 47.5 km: 18T + 20T = 47.5.
- Solving the equation, we get 38T = 47.5.
- Therefore, T = 47.5 / 38 = 1.25 hours.
Conclusion
- The two cyclists will take 1.25 hours to be 47.5 km apart if one is cycling north at 18 kmph and the other is cycling south at 20 kmph.
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Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart?
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Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart?.
Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two cyclists start from the same place in opposite directions one goes towards north at 18 kmph and the other goes towards south at 20 kmph what time will they take to be 47.5 km apart?.
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