ab×h÷3
ab=pi×r²
ab=(3.1416)4²
ab=3.1416(16)
ab=50.26
50.26(16)÷3
804.16÷3
268.05 dm²
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ab×h÷3
ab=pi×r²
ab=(3.1416)4²
ab=3.1416(16)
ab=50.26
ab×h÷3
50.26(16)÷3
804.16÷3
268.05 dm²