An astronaut weighs 170 pounds on Earth but only 68 pounds on Mars. While visiting the planet, the astronaut removes a rock sample that weighs 25 pounds on Mars.
What is the weight of the rock sample on Earth?
Help me solve.

a. 0.22
b. 4
c. 0.5
d. not enough info.



2 years ago Comment

The ratio of the man's weights on Earth and Mars should be equal to the ratio of the rocks weight on Earth and Mars. By letting x be the stone's weight on Earth, the equation that best describe the condition is,
                      (170 pounds / 68 pounds) = (x pounds / 25 pounds)
The value of x is 62.5 pounds. If the units of the choices in the pounds then, it is not among the choices.