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6. 22/7×7×7×16=22×7=154×16=
=2.464
caranya
phi×r×r×t
7. 1/2×a×t×tp
1/2×12×9×10
540
8. phi ×r×r
22/7×7×7
154
9. a×t
5×6
30
10. L1=1/2×a×t
1/2×15×10
150
L2=p×l
15×20
300
Total=150+300
=450