Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 32)
A rectangle measures 12 cm by 5 cm, with both measurements correct to the nearest centimeter. What is the smallest possible area of the rectangle?
50.0 cm²
50.25 cm²
51.0 cm²
52.0 cm²
Explanation
Use the lower bound for each side. The lower bound for 12 cm is 11.5 cm, and for 5 cm it is 4.5 cm. The area is 11.5 * 4.5 = 51.75 (Which to the nearest cm is 52 cm²)
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