Question

Aflati aria totala sivolumul unui cubid cu dimensiunile: lungimea 9cm inaltimea 4cm latimea 2 1/3
Vă rog mult repede
Dau coroana​

Answer 1

Răspuns:

$2\frac{1}{3}cm=\frac{2*3+1}{3}cm=\frac{7}{3}cm$

At = 2(L×l + L×h + l×h)

= 2(9×7/3 + 9×4 + 7/3×4)

= 2(21 + 36 + 28/3)

= 42 + 72 + 56/3

= (126 + 216 + 56)/3

= 398/3

= 132.(6) cm²

V = L×l×h

= 9cm×7/3cm×4cm

= 252/3 cm³

= 84 cm³