Question

Newton's law of gravitation states that every body in the universe attracts every other body with a force F that varies directly as the product of their masses (m1, m2) and inversely as the square of the distance d between them. If both masses are increased by 70% and the distance between them is halved, by what percent will the force of attraction increase? Round your answer to the nearest integer.

Answer 1

hopeful perhaps true but surely correct method