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Like one student takes 20 mins if he go with speed 15kmph and at what speed he should go to reach in 15 mins (nos are not same)
- a)15kmph
- b)16kmph
- c)12kmph
- d)14kmph
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Like one student takes 20 mins if he go with speed 15kmph and at what ...
Correct ans =20kmph
Distance covered by the student in 20 min with the speed of 15kmph = 20*15 = 300
Now the speed in which the same distance covered in 15 min = 300/15 = 20
Thus speed = 20kmph
Distance covered by the student in 20 min with the speed of 15kmph = 20*15 = 300
Now the speed in which the same distance covered in 15 min = 300/15 = 20
Thus speed = 20kmph
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Community Answer
Like one student takes 20 mins if he go with speed 15kmph and at what ...
Problem Analysis:
We are given that a student takes 20 minutes to reach a particular destination with a speed of 15 km/h. We need to find the speed at which the student should travel in order to reach the same destination in 15 minutes.
Solution:
Let's assume the distance between the starting point and the destination is 'd' km.
To find the speed at which the student should travel to reach the destination in 15 minutes, we can use the formula:
Speed = Distance / Time
Step 1: Calculate the distance 'd' using the given information.
Given that the student takes 20 minutes to cover the distance with a speed of 15 km/h, we can use the formula:
Distance = Speed * Time
Distance = 15 km/h * (20/60) h = 5 km
So, the distance between the starting point and the destination is 5 km.
Step 2: Calculate the speed at which the student should travel to reach the destination in 15 minutes.
Given that the student needs to reach the destination in 15 minutes, we can use the formula:
Speed = Distance / Time
Substituting the values, we get:
Speed = 5 km / (15/60) h = 20 km/h
Therefore, the student should travel at a speed of 20 km/h to reach the destination in 15 minutes.
Final Answer:
The student should travel at a speed of 20 km/h to reach the destination in 15 minutes. Hence, the correct answer is option 'B' - 16 km/h.
We are given that a student takes 20 minutes to reach a particular destination with a speed of 15 km/h. We need to find the speed at which the student should travel in order to reach the same destination in 15 minutes.
Solution:
Let's assume the distance between the starting point and the destination is 'd' km.
To find the speed at which the student should travel to reach the destination in 15 minutes, we can use the formula:
Speed = Distance / Time
Step 1: Calculate the distance 'd' using the given information.
Given that the student takes 20 minutes to cover the distance with a speed of 15 km/h, we can use the formula:
Distance = Speed * Time
Distance = 15 km/h * (20/60) h = 5 km
So, the distance between the starting point and the destination is 5 km.
Step 2: Calculate the speed at which the student should travel to reach the destination in 15 minutes.
Given that the student needs to reach the destination in 15 minutes, we can use the formula:
Speed = Distance / Time
Substituting the values, we get:
Speed = 5 km / (15/60) h = 20 km/h
Therefore, the student should travel at a speed of 20 km/h to reach the destination in 15 minutes.
Final Answer:
The student should travel at a speed of 20 km/h to reach the destination in 15 minutes. Hence, the correct answer is option 'B' - 16 km/h.
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