Piu and Titu stan from the same place at the same time and walk in opposite directions. If Piu walks at 5 km/h and Titu walks at 2 km/h, after what time will they be 10.5 km apart?

1.5 hours

Relative speed = 5 + 2 = 7 km/h

( when they both moves in opposite direction )

Distance b/w Piu and Titu = 10.5 km

Time = \(\frac{Distance}{Speed}\

= $\frac{10.5}{7}$

= 1.5 hours