Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 33)
The measurement of a piece of paper is given as 21.0 cm by 29.7 cm, both 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
626.25 cm²
คำอธิบาย
To find the lower bound of the area, multiply the lower bounds of the measurements: 20.95 cm * 29.65 cm = 620.95 cm²