Mathematics for IGCSE & O level - Limits Of Accuracy (Section 3 - No. 35)
A mass is recorded as 30 cm to the nearest 10 cm. What could the actual mass be?
20 cm
24.9 cm
25 cm
35 cm
Explanation
If it's to the nearest 10 cm, it must be between 25 and 35, as these are the nearest numbers to 30. 20cm could be 0 to 20.
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