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)
