A cave explorer drops a stone down a chasm and hears the stone hit water $3\mathrm{.}63$ s later. What is the height of the cave explorer above the water? Anwser to the nearest hundredth of a metre and include the unit m in your answer.

On a ride in the country a cyclist covers $19\mathrm{.}2$ km in $1\mathrm{.}2$ hours. What is the cyclist's average speed in m$/$s$.$