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\( Q 20 \) The side of a cube is 8\( \mathrm { cm } \) . If it is cut into smaller cubes of side 2\( \mathrm { cm } \) then find the number of such cubes? \( ( 0 ) \) The diameter of a garden roller is 1.4\( \mathrm { m } \) and it is 2\( \mathrm { m } \) long. How much area will it cove in 5 revolutions? \( \left( \pi = \frac { 32 } { 7 } \right) \)

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