Maths homework volumes anyone can help?

1) Volume of cuboid =l * b*h9.7*1.8*2.5=43.65 2a =

Step-by-step explanation:

look at the diagram .the third is complete and the Instruction says they all have same volume so :2.5 *8*9 = 180.definitely the volume for each of the cuboid is 180. Volume of cubiod = l*b*ha)180 = 4*5*a 180 = 20a180/20 = 20a/20a= 9b) 180 = 6*6 *b 180 = 36b b= 180/36 b= 5 c) 180= 2.5 *9*c 180 = 22.5 *cc=180/22.5c=8 I don't know 3and 4pls mark me brainlest I need it dearly