Answer:
I believe the answer to this question is: 100.
length times width times height
Step-by-step explanation:
width is height by the way
so 20×10×9 gives you 1800
1800 petrol can hold on Meters
7x+63
= 7 (x +9)
Hope it helps ya
Could not do the 2nd one, but will update if I figure it out
