Question

please answer my questions​

Answer 1

Answer:

i) volumn = 20.47

ii) volumn = 24

iii) volumn = 11.05

and how to find surface area i forgoted

Answer 2

Step-by-step explanation:

Surface area of cube = 6a^2

1) 6.4 cm = 6 x 6.4^2 = 6 x 40.96 = 245.76 cm^2

2) 8 cm = 6 x 8^2 = 6 x 64 = 384 cm^2

3) 2.5 cm = 6 x 2.5^2 = 6 x 6.25 = 37.5 cm^2

Volume of cube = a^3

1) 6.4 cm = 6.4^3 = 262.144 cm^3

2) 8 cm = 8^3 = 512 cm^3

3) 2.5 cm = 2.5^3 = 15.625 cm^3