An object is dropped is an unknown planet from height 50 m, it reaches the ground is 2 s. The acceleration due to gravity in this unknwon planet is

An object is dropped is an unknown planet from height 50 m, it reaches

1.	An object is dropped is an unknown planet from height 50 m, it reaches the ground is 2 s. The acceleration due to gravity in this unknwon planet is
Answer» `20MS^(-2)` `25ms^(-2)` `15MS^(-2)` `30MS^(-2)` Solution :`s=ut+(1)/(2)at^(2),u=0` `a=(2s)/(t^(2))=(2xx50)/((2)^(2))=25ms^(-2)`.