Average Practice Test 1

Ratio of rainfall on Monday and Friday = 20x : 21x Total rainfall on Monday, Tuesday, Wednesday and Thursday = 420.5 × 4 = 1,682 cm Total rainfall on Tuesday, Wednesday, Thursday and Friday = 440.5 × 4 = 1,762 cm Total rainfall on Friday - Monday = 1,762 - 1,682 = 80 cm.Ratio of rainfall on Monday and Friday = 20x : 21x $21x-20x=80$ $x = 80$Rainfall on Monday $= 20x= 20 \times 80 =1600$ cmRainfall on Friday $= 21x= 21 \times 80 =1680$cm