Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90
2.645 lalalalalalalalalala
256.5/18= 14.25
(14.25x2)+(18x2)= 64.5m
Answer:
volume = 840 cubic cm
(3.2/100)×840= 26.88 per day
after 4 days = 26.88×4=107.5
answer is 107.5
