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A bullet fired from a rifle travels at an average speed of 2520 km/hr. It hits the target after 0.2 seconds. How far (in m) is the target from the rifle?
- a)70
- b)140
- c)100
- d)200
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
A bullet fired from a rifle travels at an average speed of 2520 km/hr....
Speed = 2520 km/hr and time = 0.2 sec = 0.2/3600 hr
∴ Distance = 2520 × (0.2/3600) = 0.140 km = 140 m
∴ Distance = 2520 × (0.2/3600) = 0.140 km = 140 m
Most Upvoted Answer
A bullet fired from a rifle travels at an average speed of 2520 km/hr....
Given:
- Average speed of the bullet = 2520 km/hr
- Time taken to hit the target = 0.2 seconds
To find:
- Distance between the rifle and the target
Formula:
- Distance = Speed × Time
Calculation:
- Convert the average speed of the bullet from km/hr to m/s:
1 km/hr = 1000 m/3600 s (Since 1 km = 1000 m and 1 hour = 3600 seconds)
So, 2520 km/hr = (2520 × 1000) / 3600 m/s = 700 m/s
- Substitute the values in the formula:
Distance = Speed × Time
Distance = 700 m/s × 0.2 s
Distance = 140 m
Therefore, the target is 140 meters away from the rifle. Hence, option B is the correct answer.
- Average speed of the bullet = 2520 km/hr
- Time taken to hit the target = 0.2 seconds
To find:
- Distance between the rifle and the target
Formula:
- Distance = Speed × Time
Calculation:
- Convert the average speed of the bullet from km/hr to m/s:
1 km/hr = 1000 m/3600 s (Since 1 km = 1000 m and 1 hour = 3600 seconds)
So, 2520 km/hr = (2520 × 1000) / 3600 m/s = 700 m/s
- Substitute the values in the formula:
Distance = Speed × Time
Distance = 700 m/s × 0.2 s
Distance = 140 m
Therefore, the target is 140 meters away from the rifle. Hence, option B is the correct answer.
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Community Answer
A bullet fired from a rifle travels at an average speed of 2520 km/hr....
Speed = 2520 km/hr and time = 0.2 sec = 0.2/3600 hr
∴ Distance = 2520 × (0.2/3600) = 0.140 km = 140 m
∴ Distance = 2520 × (0.2/3600) = 0.140 km = 140 m
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A bullet fired from a rifle travels at an average speed of 2520 km/hr. It hits the target after 0.2 seconds. How far (in m) is the target from the rifle?a)70b)140c)100d)200Correct answer is option 'B'. Can you explain this answer?
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