Tolong Bantu, Please...

1.a. volume bangun = Luas alas x Tinggi
=35 cm x 10 cm
= 350 cm x 18 cm
=6300 cm³
b. luas persegi panjang = p x l
= 35 cm x 10 cm
= 350 cm
2. maaf ga bisa jawab
3.a.V tabung = La x t
= 22/7 x 21 x 21
= 22 x3x 21
=1386 x 35
= 48510
b. 22/7 x 21 x 21
=22 x 3 x 21
= 1386

*maaf cuman bisa bantu itu aja