39Solar System Orbital MotionHard1 markThe planet Mercury orbits the Sun at an average distance of 5.8×1010 m from the Sun. Mercury takes 88 days to orbit the Sun. What is Mercury’s average orbital speed?A2.1×10−5 m / sB7600 m / sC48 000 m / sD2.8×1018 m / sGrade answerGrading criteria