Question

the length of cuboid is 30 cm breadth is 18 cm and height is 8 cm was melt to make coins of height 0.2 cm and diameter is 6 cm . findthe number of coins

Answer 1

Answer: 763 approx

Step-by-step explanation:

length of cuboid = 30 cm

breadth of cuboid = 18 cm

height of cuboid = 8 cm

volume = lbh = 30 ×18×8 = 4320 sq cm

since the volume of cuboid is same as volume of x coins

diameter of coin= 6cm

radius = D/2 = 3 cm

height = 0.2 cm

volume = 22/7 × 3 ×3 ×0.2

= 396/70 sq cm

Now, volume of cuboid = x × volume of coin

3

4320 = x × 396/70

x = 4320×70÷396

= 763.63 or 763 coins approx