Question

Bridget and Caroline are marking exam papers. Each set takes Bridget 91 minutes and Caroline 2 hours. Express the times Bridget and Caroline take as a ratio in its simplest form.

Answer 1

(4) (y - 4)/2 = (y+3)/3

= (4y - 16)/2 = (y + 3)/3

Cross multiply,

3(4y - 16) = 2(y + 3)

12y - 48 = 2y + 6

10y = 54

y = 5.4 or y= 27/5