K = πd ⇒ 88 = ⇒ 88x7 = 22d ⇒ 616 = 22d ⇒ d = 616:22 = 28 cm. r = 28:2 = 14 cm = 1,4 dm
V = πr²t = x 1,4² x 0,7 dm = x 1,96 x 0,7 = 4,312 dm³
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K = πd ⇒ 88 = ⇒ 88x7 = 22d ⇒ 616 = 22d ⇒ d = 616:22 = 28 cm. r = 28:2 = 14 cm = 1,4 dm
V = πr²t = x 1,4² x 0,7 dm = x 1,96 x 0,7 = 4,312 dm³
Semoga membantu :)