Question

how much of salt must be added to 60 litres of a 20% solution of salt to increasebit to a 40% solution of salt?

Answer 1

your answer

(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)(^_^)