Question

the diameter of a spherical ball is 21 cm. how much leather is required to prepare 5 such balls​

Answer 1

Answer:2205cm cube

Step-by-step explanation:go through the photo attached and please mark brainliest

Answer 2

GIVEN:

• Diameter of spherical ball = 21 cm

TO FIND:

• how much leather is required to prepare 5 such balls ?

SOLUTION:

Diameter of a spherical ball = 21 cm

$\rm{Radius = \dfrac{Diameter}{2}}$

$\bf{Radius = \dfrac{21}{2} \: cm}$

We know that the formula for finding the volume of sphere is:-

$\bf{\star \: Volume = \dfrac{4}{3} \pi r^3 \: \star}$

According to question:-

On putting the values in the formula, we get

Take π = 22/7

$\rm{\longrightarrow Volume = \dfrac{4}{3} \times \dfrac{22}{7} \times \dfrac{21}{2} \times \dfrac{21}{2} \times \dfrac{21}{2}}$

$\rm{\longrightarrow Volume = \dfrac{\cancel{4}}{\cancel{3}} \times \dfrac{\cancel{22}}{\cancel{7}} \times \dfrac{\cancel{21}}{\cancel{2}} \times \dfrac{21}{\cancel{2}} \times \dfrac{21}{\cancel{2}}}$

$\rm{\longrightarrow Volume = 11 \times 21 \times 21}$

$\bf{\star \: Volume = 4851 \: cm^3 \: \star}$

✰【Leather required for 5 such balls = 5 $\times$ Volume】✰

➝ $\rm{ 5 \times 4851 }$

➝ $\bf{\star \: 24255 \: cm^3 \: \star}$

❝ Hence, the leather required for 5 such balls is 24255 cm³ ❞

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