Mathematics for IGCSE & O level - Limits Of Accuracy (Section 3 - No. 34)
A piece of red string is 35.2 cm long to the nearest millimeter and a piece of blue string is 12.6 cm long to the nearest millimeter. What is the lower bound of the difference in their lengths (red - blue)?
22.55 cm
22.6 cm
22.65 cm
22.7 cm
Explanation
The lower bound difference is calculated by subtracting the upper bound of the smaller value (blue) from the lower bound of the larger value (red). LB of red = 35.15cm; UB of blue= 12.65cm. 35.15 - 12.65 = 22.5cm
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