Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 25)
The measurements of a piece of A4 paper are given as 21.0 cm and 29.7 cm to the nearest millimetre. What is the lower bound of the area of this piece of paper?
620.95 cm²
621.0 cm²
621.1 cm²
621.1675 cm²
Explanation
The lower bound of the area is found by multiplying the lower bounds of the measurements: 20.95 cm * 29.65 cm = 620.95 cm²
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