Question

Kiran and Sonia start working from the same place in the opposite direction is Sonia worked at a speed of 2 integer 1.2 kilometre per hour and Kiran at a speed of 2 km per hour in how much time they be 18 kilometre apart​

Answer 1

Relative speed

= \left ( \frac{5}{2}+2 \right )\ km/hr = \frac{9}{2}\ km/hr

Time = \frac{Distance}{Relative\ Speed} = \frac{18}{\frac{9}{2}}

= \frac{18\times 2}{9} = 4\ hours.