Question

how many lead balls each of radius 4 cm can be made by melting a lead sphere of diameter 40 cm?

Answer 1

hope my asnwer helps you.

Answer 2

Answer:

125

Step-by-step explanation:

Diameter of lead sphere = 40 cm

Radius of lead sphere = 40/2 = 20 cm

Volume of lead sphere = $\frac{4}{3} \pi r^{3}$

                                       = $\frac{4}{3} \times 3.14 \times(20)^{3}$    

                                       = $33493.3333333$    

Volume of lead ball = $\frac{4}{3} \pi 4^{3}$

                                = $\frac{4}{3} \times 3.14 \times 4^{3}$    

                                = $267.946666667$

No. of lead balls can be formed = $\frac{33493.3333333}{267.946666667}$

                                                   = $125$

Hence 125 lead balls can be formed  by melting a lead sphere of diameter 40 cm