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176 = 22/7 × d
d = 176 × 7/22
d = 8 × 7
d = 56
r = d : 2
= 56 : 2
= 28 cm
La = π × r²
= 22/7 × 28²
= 22/7 × 784
= 22 × 112
= 2464 cm²
V = La × t
= 2464 cm² × 150 cm
= 369600 cm³