SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Kilogran
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Meter
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Second
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Kilometer
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Detailed explanation-1: -The metre is the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second. This definition fixed the speed of light in vacuum at exactly 299792458 metres per second (≈300000 km/s or ≈1.079 billion km/hour).
Detailed explanation-2: -The basic units for length or distance measurements in the English system are the inch, foot, yard, and mile. Other units of length also include the rod, furlong, and chain. survey foot definition. In the English system, areas are typically given in square feet or square yards.
Detailed explanation-3: -Complete answer: All the four units given are used for measurement of length but the SI unit of length is metres. So, the SI unit of length is metre.