The numerical ratio of speed to velocity is

A car moving at a uniform speed covers a distance of $200 \mathrm{m}$ in $4 \mathrm{s}$. Calculate the speed of the car.

A car moving at a uniform speed covers a distance of $200 \mathrm{m}$ in $4 \mathrm{s}$. Calculate the time it will take to cover $300 \mathrm{m}$.

A car moving at a uniform speed covers a distance of $200 \mathrm{m}$ in $4 \mathrm{s}$. Calculate the distance it will cover in $5 \mathrm{s}$.

Sweta swims in a $90 \mathrm{m}$ long pool. She covers $180 \mathrm{m}$ in $90 \mathrm{s}$ by swimming from one end to the other and back along the same straight path. Find the average speed and the average velocity of Sweta.