A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A ...

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A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A food packet is dropped from the helicopter when it is at a height \( h \). The time taken by the packet to reach the ground is close to [ \( g \) is the acceleration due to gravity]
(a) \( t=1.8 \sqrt{\frac{h}{g}} \)
(b) \( t=\sqrt{\frac{2 h}{3 g}} \)
- (c) \( t=\frac{2}{3} \sqrt{\left(\frac{h}{g}\right)} \)
(d) \( t=3.4 \sqrt{\left(\frac{h}{g}\right)} \)
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