- Volume of cube is = (side)cube then, 33cube is become 1089 Ans.
- 1800 = 2cube × 3square × 5square It is clear that we multiply by 15 to get the sum of digit is 6 Ans.
- {100 × 13/20}kg = 65 kg Ans.
- Let third proportion be X. 9:12::12:X = 9x = 12 × 12 = x = 16 Ans.
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