Sunday, September 25, 2011

P5 average, fraction


Total petrol for 6 months --> 70 x 6 = 420 (ml)

(a) Apr & May -->  420 - (60 + 80 + 40 + 70)
                          =   420 - 250
                          =   170

.     ____ 15u ___   _4u_
.    /            \ /    \  
Apr |--------------|------| \  170 ml
May |--------------|        /
.    \____   _____/
.         15u

34u --> 170
1u --> 170 / 34 = 5
Apr --> 19 x 5 = 95
(b) Highest petrol comsumption -->  95 ml   (in the month of April)