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How long will a boy take to run round a square field of side 25 metres, if he runs at the rate of 9 km/hr ?
- a)42 sec.
- b)38 sec.
- c)48 sec.
- d)40 sec.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
How long will a boy take to run round a square field of side 25 metres...
Given:
Side of a square field = 25 meters
The speed of boy = 9 km/hr
Concept used:
To convert kilometers per hour to meters per second, multiply it with 5/18
Formula used:
Perimeter of square = 4 × side of square
Time = Distance/Time
Calculation:
We will covert its unit with m/s, so we get
9 km/hr = 9 × (5/18) = 5/2 m/s
According to the question:
Distance run around the field (d) = Perimeter of the field
Perimeter of square = 4 × side of square
⇒ d = 4 × 25m = 100 meters
Now,
Time (time taken to run around the field) = 100 m/(5/2) m/s
⇒ 100 ×(2/5) sec = 20 × 2 = 40 sec
∴ Time taken to run around the field is 40 sec.
Most Upvoted Answer
How long will a boy take to run round a square field of side 25 metres...
Given data:
- Side of the square field = 25 meters
- Speed of the boy = 9 km/hr
Converting speed to m/s:
- 9 km/hr = 9 * 1000 / 3600 m/s
- Speed of the boy = 2.5 m/s
Calculating the distance:
- Perimeter of the square field = 4 * side
- Perimeter = 4 * 25 = 100 meters
Calculating time taken:
- Time = Distance / Speed
- Time = 100 / 2.5 = 40 seconds
Therefore, the boy will take 40 seconds to run round a square field of side 25 meters at a speed of 9 km/hr. So, the correct answer is option 'd) 40 sec'.
- Side of the square field = 25 meters
- Speed of the boy = 9 km/hr
Converting speed to m/s:
- 9 km/hr = 9 * 1000 / 3600 m/s
- Speed of the boy = 2.5 m/s
Calculating the distance:
- Perimeter of the square field = 4 * side
- Perimeter = 4 * 25 = 100 meters
Calculating time taken:
- Time = Distance / Speed
- Time = 100 / 2.5 = 40 seconds
Therefore, the boy will take 40 seconds to run round a square field of side 25 meters at a speed of 9 km/hr. So, the correct answer is option 'd) 40 sec'.
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How long will a boy take to run round a square field of side 25 metres...
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How long will a boy take to run round a square field of side 25 metres, if he runs at the rate of 9 km/hr ?a)42 sec.b)38 sec.c)48 sec.d)40 sec.Correct answer is option 'D'. Can you explain this answer?
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How long will a boy take to run round a square field of side 25 metres, if he runs at the rate of 9 km/hr ?a)42 sec.b)38 sec.c)48 sec.d)40 sec.Correct answer is option 'D'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about How long will a boy take to run round a square field of side 25 metres, if he runs at the rate of 9 km/hr ?a)42 sec.b)38 sec.c)48 sec.d)40 sec.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How long will a boy take to run round a square field of side 25 metres, if he runs at the rate of 9 km/hr ?a)42 sec.b)38 sec.c)48 sec.d)40 sec.Correct answer is option 'D'. Can you explain this answer?.
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