A] The author of the novel 'The Grapes of Wrath' is Ayn Rand. B] The author of the novel 'The Fountainhead' is John Steinbeck. C] The author of the novel 'Ancillary Justice' is Ann Leckie.
Which of the statements given above are not correct?
If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is _________________.