Akriti is travelling at a speed of 54 km/h on a highway, while Dushyant is travelling at a speed of 81 km/h.  What is the difference in their speeds, in meters per second?

27 15 10 7.5

7.5

Akriti = 54 km/h  Dushyant = 81 km/h Difference = (81 - 54) = 27 × \(\frac{5}{18}\) = 7.5 m/sec