When the clock reads 8:10 AM, a car's odometer reads 21326.0 km. If the car's odometer reads 21386.0 km at 8:50 AM, then determine the car's speed in km/min and km/hr.

Distance = 21386 - 21326 = 60 km
Time = 40 min = $\frac{40}{60}$ hr

Speed = $\frac{\mathrm{Distance} \mathrm{covered}}{\mathrm{Time}}$

Speed in km/min = $\frac{60}{40}= 1.5 \mathrm{km}/\min$

Speed in km/min = $\frac{60}{{\displaystyle \frac{40}{60}}}=\frac{60 \times 60}{40} =90 \mathrm{km}/\mathrm{hr}$
Therefore, 1.5 km/min, 90 km/hr is the correct answer.