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Rohit and Ronit start together from a point in opposite direction on bike. Rohit’s speed is 21Km/h and Ronit’s speed is 15km/h. What will be the distance between them after 20 mintues?
- a)10 km
- b)14 km
- c)16 km
- d)12 km
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Rohit and Ronit start together from a point in opposite direction on b...
Rohit and Ronit's speeds
Rohit's speed = 21 km/h
Ronit's speed = 15 km/h
Time traveled
Both Rohit and Ronit start from the same point and move in opposite directions. Let's assume that after 20 minutes, Rohit and Ronit are at a distance x from each other.
We know that speed = distance/time. Rearranging this equation, we can write distance = speed × time.
Rohit's distance traveled in 20 minutes = 21 km/h × (20 minutes ÷ 60 minutes/hour) = 7 km
Ronit's distance traveled in 20 minutes = 15 km/h × (20 minutes ÷ 60 minutes/hour) = 5 km
Since Rohit and Ronit are moving in opposite directions, the total distance between them after 20 minutes is the sum of their individual distances traveled. Therefore, the distance between them after 20 minutes is 7 km + 5 km = 12 km.
Conclusion
The distance between Rohit and Ronit after 20 minutes is 12 km.
So, none of the given options (a) 10 km, (b) 14 km, (c) 16 km, or (d) 20 km is correct.
Rohit's speed = 21 km/h
Ronit's speed = 15 km/h
Time traveled
Both Rohit and Ronit start from the same point and move in opposite directions. Let's assume that after 20 minutes, Rohit and Ronit are at a distance x from each other.
We know that speed = distance/time. Rearranging this equation, we can write distance = speed × time.
Rohit's distance traveled in 20 minutes = 21 km/h × (20 minutes ÷ 60 minutes/hour) = 7 km
Ronit's distance traveled in 20 minutes = 15 km/h × (20 minutes ÷ 60 minutes/hour) = 5 km
Since Rohit and Ronit are moving in opposite directions, the total distance between them after 20 minutes is the sum of their individual distances traveled. Therefore, the distance between them after 20 minutes is 7 km + 5 km = 12 km.
Conclusion
The distance between Rohit and Ronit after 20 minutes is 12 km.
So, none of the given options (a) 10 km, (b) 14 km, (c) 16 km, or (d) 20 km is correct.
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Community Answer
Rohit and Ronit start together from a point in opposite direction on b...
Rohit’s speed = 21 km/h
Ronit’s speed = 15 Km/h
As we know that they start from opposite direction.
Thus, the relative speed = 21 Km/h + 15 Km/h = 36 Km/h.
The distance between Rohit and Ronit after 20 minutes = 36/3
= 12 km
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Rohit and Ronit start together from a point in opposite direction on bike. Rohit’s speed is 21Km/h and Ronit’s speed is 15km/h. What will be the distance between them after 20 mintues?a)10 kmb)14 kmc)16 kmd)12 kmCorrect answer is option 'D'. Can you explain this answer?
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