Question

what is the answer ​

Answer 1

Answer:

384

Step-by-step explanation:

radius (r1)=2.5cm/2

radius (r1)=1.25cm

height (h)= 0.4cm

Volume= π×1.25×1.25×0.4

radius (r2)= 4cm

height(h2)=15cm

Volume= π×4×4×15

Number of coins= (π×4×4×15)/(

π×1.25×1.25×0.4)

Number of coins= 384

Answer 2

Answer:

Step-by-step explanation:

Volume of each coin = π×[0.75²]×0.2 =0.1125π cm³

Volume of melted cylinder = π× (2.25)²× 10 = 50.625π cm³

number of coin required = (volume of melted cylinder)/(volume of each coin)

                                = 50.625π/0.1125π = 450 coins

hope this helps you....!!!