How many solid coins of diameter 6 cm and thickness 0.2 cm can be made

1.	How many solid coins of diameter 6 cm and thickness 0.2 cm can be made bymelting a solid metal cuboid of length 33 cm. breath 18 cm and height 8cm?
Answer» Cuboid length = 33 cm, breadth = 18 cm, height = 8 cm Volume of cuboid Vc = lengthbreadthheightVc = 33188 = 4752 cm^3 Coin diameter = 6 cm, thickness = .2 cmVolume of coin Vcn = pirrhVcn = (22/7)6/26/2.2 = 198/35 Let number of coins can be made = n Then, nVcn = Vcn198/35 = 4752n = 475235/198 = 2435n = 840 Therefore 840 solid coins can be made

How many solid coins of diameter 6 cm and thickness 0.2 cm can be made bymelting a solid metal cuboid of length 33 cm. breath 18 cm and height 8cm?

Answer»

Cuboid length = 33 cm, breadth = 18 cm, height = 8 cm

Volume of cuboid Vc = length*breadth*heightVc = 33*18*8 = 4752 cm^3

Coin diameter = 6 cm, thickness = .2 cmVolume of coin Vcn = pi*r*r*hVcn = (22/7)*6/2*6/2*.2 = 198/35

Let number of coins can be made = n

Then, n*Vcn = Vcn*198/35 = 4752n = 4752*35/198 = 24*35n = 840

Therefore 840 solid coins can be made