calculate the cuboid 2:
A cuboid has a volume of 900 cm³, a width of 5 cm and a height of 12 cm.
a) calculate the length
b) calculate the surface area
c) calculate the volume
answer:
a) answer length:
V = l * w * h
900 = l * 5 * 12
900 = l * 60 / : 60
l = 15 cm
A: The length is 15 cm.
b) answer surface area:
A = 2*lw + 2*lh + 2*wh
A = 2*15*5 + 2*15*12 + 2*5*12
A = 150 + 360 + 120
A = 630 cm²
A: The surface area is 630 cm².
c) answer volume:
V = l * w * h
V = 12 * 8 * 10
V = 960 cm³
A: The volume is 960 cm³.