If the speed of a vehicle increases by 2ms^(-1), its kinetic energy is doubled, then original speed of the vehicle is

If the speed of a vehicle increases by 2ms^(-1), its kinetic energy is

1.	If the speed of a vehicle increases by 2ms^(-1), its kinetic energy is doubled, then original speed of the vehicle is
Answer» `(SQRT(2)+1)ms^(-1)` `2(sqrt(2)-1)ms^(-1)` `2(sqrt(2)+1)ms^(-1)` `2sqrt(2)+1 ms^(-1)` ANSWER :C