Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 1)
Pencils have a width of 8mm, to the nearest millimetre. What is the smallest total width of 10 pencils?
75 mm
75.0 mm
75.5 mm
80 mm
คำอธิบาย
Each pencil is at least 7.5 mm wide (8 - 0.5). 7.5mm*10 pencils = 75 mm.