exam Maths Puzzle Numerical Ability

A chemist has 300 grams of 20% hydrochloric acid solution. He wishes to drain some off and replace it with an 80% solution so as to obtain a 25% solution. How many grams must be drain and replace it with 80% solution.

Read Solution (Total 0)

exam Other Question

The surface area of a sphere varies directly with the square of its radius. If the surface area of a sphere with a radius of 12 inches if 576 square inches, find the surface area of a sphere with a radius of 3 inches Express the compound fraction to lowest terms

28t^3u/3rs^3/7t^4u^4/9s^4