Volume sebuah tabung 88.740cm kubik jika tingginya 36 cm hitunglah: A.panjang jari jari tabung B.luas selimutnya

Dik. Volume tabung = 88.704cm³ & Tinggi tabung = 36cm.
Dit. a) Jari² tabung & b) Luas selimut tabung ?

Jawab...

Volume tabung = πr²t
@ v = πr²t
@ 88704 = 22/7 x r² x 36
@ 88704 x 7/22 = r² x 36
@ 28224 = r² x 36
@ r² = 28224/36
@ r² = 784
@ r = √784 = 28cm

Luas Selimut tabung (Lst) = 2πrt
@ Lst = 2πrt
@ Lst = 2 x 22/7 x 28 x 36
@ Lst = 22/7 x 2016
@ Lst = 6336cm²

Semoga membantu... ^_^