27. L = 30cm; W = 5cm; H = 15cm

A. 2250
B. 2340
C. 1125

28. L = 8cm; W = 2cm; H = 6cm

A. 87
B.41
C.96

29. L = 15cm; W = 4cm; H = 8cm

A. 480
B. 27
C. 390

30. L = 7cm; W = 5cm; H = 12cm

A. 24
B. 420
C. 265 ​

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