An Object Dropped from an Airplane $3250 \mathrm{~m}$ Above the Ground Falls According to the Equation

An object dropped from an airplane $3250 \mathrm{~m}$ above the ground falls according to the equation $\mathrm{h}=$ $3250-4.95 t^{2}$ , where $h$ is the height in metres above the ground and $t$ is the time in seconds. Find the time for the object to fall a height of $2755 \mathrm{~m}$ above the ground.

A) $8.0 \mathrm{~s}$
B) $1 \overline{0} \mathrm{~s}$
C) $17 \mathrm{~s}$
D) $2 \overline{0} \mathrm{~s}$