If x km/h = y m/s, then y =

A.

\(\frac{7}{18}\)x

B.

\(\frac{11}{20}\)x

C.

\(\frac{4}{15}\)x

D.

\(\frac{5}{18}\)x

Correct answer is D

x kmh-1 = y ms-1

\(\frac{x km}{1 hr}\) = y ms-1

\(x \times \frac{1km}{1hr}\) = y ms-1

\(x \times \frac{1000m}{60 \times 60s}\) = y ms-1

\(x \times \frac{1000}{3600} \frac{m}{s}\) = y ms-1

\(x \times \frac{5}{18} ms^{-1}\)

\(x \times \frac{5}{18} ms^{-1}\) = y ms-1

y = \(\frac{5}{18}\)x