Answer:
6
I can't tell but you can try.
32.3cm (nearly 13 inches) (12.9 inches)
2.5cm = 1 inch. To figure out what 3 quarters ( 3/4 ) of an inch is, divide 2.5 by 4 then multiply by 3. ( 2.5/4 x3 ) This equals 1.9cm. There are 17 blocks so multiply 1.9 by 17. ( 1.9/17 = 32.3) 30 cm = 12 inches. 2.3 is 90% of 2.5, so add 0.9 to 12.
(a) Volume of any Pyramid = 
cubic units
(b) Sarah doesn't have to go through all the hard work as the smaller pyramid has a ratio of 2:3 to the bigger pyramid, so we get the equation, to help us solve it.
Hope that helps!
Answer:
I'm pretty sure the answer is A
