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Calcul de l’Aire et du Volume d’un Tronc de Cône (Nombres Décimaux au Centième Près) (A)

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(1)

Aire et Volume d’un Tronc de Cˆ

one (A)

Calculez l’aire et le volume de chaque tronc de cˆ

one.

Aire = π(r1+ r2) q (r1–r2)2+ h2+ πr12+ πr22 Volume = π 3h(r1 2 + r22+ r1r2) r1 = 77,60 m h = 78,80 m r2 = 55,40 m

1.

r1 = 119,61 nm h = 137,43 nm r2 = 25,38 nm

2.

r1 = 49,64 cm h = 51,51 cm r2 = 22,10 cm

3.

r1 = 123,83 hm h = 172,84 hm r2 = 55,39 hm

4.

MathsLibres.com

(2)

Aire et Volume d’un Tronc de Cˆ

one (A) R´eponses

Calculez l’aire et le volume de chaque tronc de cˆ

one.

Aire = π(r1+ r2) q (r1–r2)2+ h2+ πr12+ πr22 Volume = π 3h(r1 2 + r22+ r1r2) r1 = 77,60 m h = 78,80 m r2 = 55,40 m

1.

Aire: 62.766,79 m2 Volume: 1.104.928,35 m3 r1 = 119,61 nm h = 137,43 nm r2 = 25,38 nm

2.

Aire: 122.869,90 nm2 Volume: 2.588.536,96 nm3 r1 = 49,64 cm h = 51,51 cm r2 = 22,10 cm

3.

Aire: 22.440,00 cm2 Volume: 218.439,18 cm3 r1 = 123,83 hm h = 172,84 hm r2 = 55,39 hm

4.

Aire: 162.478,09 hm2 Volume: 4.572.156,51 hm3

MathsLibres.com

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