Class 7 Exam > Class 7 Questions > Which of the following statement(s) is/are co...
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Which of the following statement(s) is/are correct?
- a)Symbols of all units are written in singular
- b)Basic unit of speed is km/h
- c)Both the above are correct
- d)None of the above is correct
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following statement(s) is/are correct?a)Symbols of all un...
Symbols of all units are written in singular
This question is part of UPSC exam. View all Class 7 courses
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Which of the following statement(s) is/are correct?a)Symbols of all un...
Correct Statement
Symbols of all units are written in singular.
Explanation
- All units of measurement have symbols which are used to represent the unit in a shorter form.
- The symbols of units are written in a singular form, even if the unit itself is plural.
- For example, the unit of length is meter and its symbol is 'm', not 'ms'.
- Similarly, the unit of time is second and its symbol is 's', not 'sec'.
- This is because the symbols are meant to be concise and easy to write, and using a plural form would make them longer and more cumbersome.
Incorrect Statement
Basic unit of speed is km/h.
Explanation
- The basic unit of speed is meter per second (m/s), not km/h.
- Km/h is a derived unit of speed, which means it is obtained by combining other units of measurement.
- Km/h is commonly used to measure the speed of vehicles, but it is not a fundamental unit of measurement.
- To convert km/h to m/s, we need to divide the speed by 3.6, since 1 km/h is equal to 0.2778 m/s.
Conclusion
The correct statement is that symbols of all units are written in singular. The basic unit of speed is not km/h, but rather m/s.
Symbols of all units are written in singular.
Explanation
- All units of measurement have symbols which are used to represent the unit in a shorter form.
- The symbols of units are written in a singular form, even if the unit itself is plural.
- For example, the unit of length is meter and its symbol is 'm', not 'ms'.
- Similarly, the unit of time is second and its symbol is 's', not 'sec'.
- This is because the symbols are meant to be concise and easy to write, and using a plural form would make them longer and more cumbersome.
Incorrect Statement
Basic unit of speed is km/h.
Explanation
- The basic unit of speed is meter per second (m/s), not km/h.
- Km/h is a derived unit of speed, which means it is obtained by combining other units of measurement.
- Km/h is commonly used to measure the speed of vehicles, but it is not a fundamental unit of measurement.
- To convert km/h to m/s, we need to divide the speed by 3.6, since 1 km/h is equal to 0.2778 m/s.
Conclusion
The correct statement is that symbols of all units are written in singular. The basic unit of speed is not km/h, but rather m/s.
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Which of the following statement(s) is/are correct?a)Symbols of all units are written in singularb)Basic unit of speed is km/hc)Both the above are correctd)None of the above is correctCorrect answer is option 'A'. Can you explain this answer?
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