Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 43)
A rectangular field measures 12 cm by 5 cm, with both measurements correct to the nearest centimetre. Calculate the greatest possible perimeter of the rectangle.
32 cm
34 cm
34.0 cm
34.5 cm
คำอธิบาย
The upper bounds for the sides are 12.5 cm and 5.5 cm. Therefore, the perimeter is 2 * (12.5 + 5.5) = 36 cm