Plss Bantu Dong Ka Pls Pls

Plss bantu dong ka pls pls

 

Jawaban:

a)

luas \: seimut \: = \pi \: d \: t \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{22}{7} \times 14 \times 12 \\ = 528 \: {cm}^{2}

b)

Lp tabung = luas selimut + 2luas lingkaran

Lp tabung = 528 + 2×22:7 ×7²

= 528 + 308

= 836cm²


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