Dik r = 7cm dan t = 24cm ..dit : luas selimut kerucut ?.... Question from @Najminia

November 2018 2 35 Report

Dik r = 7cm dan t = 24cm ..dit : luas selimut kerucut ?

aititin Dik r = 7cm dan t = 24cm
luas selimut kerucut =πsr
s²=t² + r²
s²= 24²+7²
s²=576+49=625
s=√625= 25 cm
luas selimut kerucut =πsr= 22/7 x 25 x 7 = 550 cm²

1 votes Thanks 1

devanaquarius Dik: ↓

R = $7~cm$

T = $24~cm$

Dit: ↓

Luas selimut kerucut = ....?

Jwb: ↓

Luas sisi = $t^2 + r^2$
Luas sisi = $24^2 + 7^2$
Luas sisi = $576 + 49$
Luas sisi = $\sqrt{625}$

Luas selimut kerucut = $\pi\times t\times r$
Luas selimut kerucut = $\frac{22}{7}\times \boxed{25}\times 7$
Luas selimut kerucut = $550~cm^2$

"Semoga membantu"

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