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The surface area of the smaller solid according to the task content is; 107m²
What is the surface area of the smaller solid?
It follows from task content that the two solids are similar. On this note, the same formula applies for calculating their areas and volume.
Since, surface area is directly proportional to the volume in both shapes;
The surface area of the smaller solid is;
A = (210 × 856)/1680
A = 107m².
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