Question

How many lead shots, each $0.3cm$ in diameter, can be made from a cuboid of dimensions $9_{cm}\times 11cm\times 12cm?$

• A. $7200$
• B. $8400$
• C. $72000$
• D. $84000$

Answer 1

The correct option is D $84000$

Number of lead shots = $\frac{volumeofcuboid}{volumeof1leadshot.}$

[Given 0.3 = d r = 0.15] $=\frac{9\times 11\times 12}{\frac{4}{3}\times \frac{22}{7}\times 0.15\times 0.15\times 0.15}$

= 84000