Question
If 89 # 97 = 135 and 68 # 86 = 96, then 88 # 89 =
?Solution
(8 x 9) + (9 x 7) = 72 + 63 = 135 (6 x 8) + (8 x 6) = 48 + 48 = 96 (8 x 8) + (8 x 9) = 64 + 72 = 136
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A cube has edge 13 m. Find its length of diagonal, surface area and volume.Β