Question

24 cubic metre wire is converted into a wire with 1 m in diameter. Find the length of the wire so formed.

Please answer this, it is worth 80 points, i need help for my exam tommorow.

Answer 1

Answer:

Volume of each cube = 64 cm3

∴ Total volume of the two cubes = 2 × 64 cm3

= 128 cm3

Let the edge of each cube = x

∴ x3 = 64 = 43

∴ x = 4 cm

Now, Length of the resulting cuboid l = 2x cm

Breadth of the resulting cuboid b = x cm

Height of the resulting cuboid h = x cm

∴ Surface area of the cuboid = 2 (lb + bh + hl) = 2[(2x . x) + (x . x) + (x . 2x)]

= 2[(2 × 4 × 4) + (4 × 4) + (4 × 2 × 4)] cm2

= 2 [32 + 16 + 32] cm2 = 2[80] cm2 = 160 cm2.

use this formula ...

Answer 2

Answer:

As we know that volume of wire is volume of cylinder

As we know that volume of wire is volume of cylinderAnd in given question silver wire is drawn from 66 cubic centimeters of silver.

As we know that volume of wire is volume of cylinderAnd in given question silver wire is drawn from 66 cubic centimeters of silver.So, we can equivalent the volume of cylinder with 66 cubic centimeters.

As we know that volume of wire is volume of cylinderAnd in given question silver wire is drawn from 66 cubic centimeters of silver.So, we can equivalent the volume of cylinder with 66 cubic centimeters.we know that volume of cylinder is π×r

By solving this question, we get l=8400 cm.

By solving this question, we get l=8400 cm.So, length of wire in metres is 84 m.