Question

a solid alumimium casting for a pulley consists of the discs each 1 1/2 cm thick of diameters 4 cm, 6 cm,and 8 cm.a central hole 2 cm in diameter is drilled out .if the density of the alumimium is 2.8g/cm^3,calculate the mass of the casting

Answer 1

I see a volume of
π(2^2)(1.5) + π(3^2)(1.5) + π(4^2)(1.5) - π(1^2)(4.5)

then multiply that result by 2.8 to get the mass in grams

Answer 2

Soive it for me i don't want hint

Answer 3

I do not understand

Answer 4

Pls where did you get your 4.5 from. I dont get

Answer 5

The 4.5
There are 3 disks each is 1.5 cm thick so the total of the three is 1.5 multiplied by 3