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Sagot :

Answer:

1. 75.40 m²

2. 60.5 dm²

Explanation:

[tex] = \pi(r) ^{2} + \pi(r)(s) \\ = \pi(3) {}^{2} + \pi(3)(5) \\ = 75.40m^{2} [/tex]

[tex] = 2(lw + lh + wh) \\ =2((45 \times 25) + (45 \times 25) + (25 \times 25)) \\ = 2(1200 + 1200 + 625) \\ = 2 \times 3025 \\ = 6050 \: cm {}^{2} \\ \\ = 6050 \div 100 \\ = 60.5 \: dm^{2} [/tex]