Question

There are 27 red ball and 13 blue balls in a bag. The ratio of the weight of the balls are 9/4. Find the percentage of weight of blue balls

Answer 1

Answer:

(R2-R)/420 = (1/14)

Cross-multiplying:

14(R2-R) = 420

Continuing to solve:

14R2-14R = 420

14R2-14R-420 = 0

R2-R-30 = 0

(R-6)(R+5) = 0