Answer is R. An object is projecyed vertically upwards with speed root gR where R is radiua of earth and g is acceleration due to gravity. Find max. height attained by it. Share with your friends Share 0 Sakshi Kanwar answered this Dear Student v2-u2=2gSv=0( at maximum height velocity is zero)-(gR)2=2gSS=R/2Regards -1 View Full Answer Keerthana P answered this Please find this answer 0