Choose the correct options for the following questions.
A balloon is going upwards with a velocity 12 $\rm{m/s}$. It releases a packet when it is at a height of 65 $\rm{m}$ from the ground. How much time the packet will take to reach the ground if $\rm{g=10 \,\, m/s^{2}}$?
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time, his speed (in km/hr) must be
