ka tolong yg bisa jawab!pakai caranya nya y!

13.
Volume Tabung
= n x r x r x T
= 22/7 x 14 x 14 x 20
= 12.320 Cm3

Volume Balok
= P x L x T
= 28 x 28 x 20
= 15.680 Cm3

Volume Total
= 12.320 + 15.680
= 28.000 Cm3


14.
Volume Tabung I
= n x r x r x T
= 3.14 x 5 x 5 x 7
= 549.5 Cm3

Volume Tabung II
= n x r x r x T
= 3.14 x 10 x 10 x 14
= 4.396 cm3

Volume Total
= 549.5 + 4.396
= 4.945,5 Cm3


15.
Volume Balok
= P x L x T
= 5 x 6 x 7
= 210 dm3

Volume Tabung
= n x r x r x T
= 22/7 x 1.75 x 1.75 x 3
= 28,875 dm3

Volume Total
= 210 + 28,875 dm3
= 238,875 dm3


Maaf kalau benar ya kak, soalnya dikelas memang saya gak terlalu cerdas.