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Verified answer
Jawab :Vt= πr² × t
1540 = 22/7×7×7×t
= 154 t
t = 1540÷154
= 10 cm
L = 2πr (r+t)
= 2×22/7×7 (7+10)
= 748 cm²
1540 = 22/7 . 7 .7.t
1540 = 154t
t = 10
Rumus Luas Sisi Tabung = (2 x 22/7 x r x r) + (2 x 22/7 x r x t)
= 2. 22/7 .r (r + t)
= 2. 22/7 .7 (7 + 10)
= 44 (17)
= 748 cm²