Question

Joker cap radius 7 cm and slanth height 25 cm find the area of material used in 12 cap

Answer 1

In this question,

Radius (r) = 7 cm

Slant Height (l) = 25 cm

$= > total \: surface \: area = \pi \: r \: l + \pi \: {r}^{2}$

$= > tsa = \frac{22}{7} \times 7 \times 25 + \frac{22}{7} \times 7 \times 7$

$= > tsa = 22 \times 25 + 22 \times 7$

$= > tsa = (550 + 154) \: {cm}^{2}$

$= > tsa = 704 \: {cm}^{2}$

Now,

Material required for 12 cap = (12 x 704) cm^2

=> Material required = 8448 cm^2


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