Which of the following is NOT a correct statement?
Answer & explanation
Correct answer: option 4
To convert speed in km/h to m/sec
x km/h = x × \(\frac{5}{18}\) = y m/sec
A) The speed of 20 m/s is less than the speed of 85 km/h.
85km/h = 85 × \(\frac{5}{18}\) = 23.61 > 20m/sec (followed)
B) Time may be calculated by dividing the distance by the speed.
Spped = \(\frac{Distance }{Time }\)
Time = \(\frac{Distance }{Speed }\) (foolowed)
C) Covering the same distance in lesser time implies a higher speed.
Spped = \(\frac{Distance }{Time }\)
From this equation we can say , lower the time taken more will be the speed .
D) The speed of 99 km/h is less than the speed of 24 m/s.
99km/h = 99 × \(\frac{5}{18}\) = 27.5 > 20m/sec (Not followed)
Hence , D is correct answer .