A car covers a distance of 25 km in 1 hour. If it is travelling at a constant speed, how much distance will it cover in 4 hours? Also, find out the time taken by it to cover a distance of 150 km?
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It is a SI base unit, and has been defined since 1967 as "the duration of 9,192,631,770 [cycles] of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the
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