Question 95

The length and breadth of a rectangle are 100 cms. and 60 cms. If the length increases by 5% and the breadth decreases by 4%, then, the error percentage in the area calculated from these measurements is

Solution

Length tabulated would be 105 cm and breadth considered = 0.96*60 = 57.6 cm
Area calculated = 105*57.6 = 6048 sq. cm
Actual area = 6000 sq. cm

error = (48/6000)*100% = 0.8%

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TS Police SI Mains 2018 Arithmetic and Reasoning

The length and breadth of a rectangle are 100 cms. and 60 cms. If the length increases by 5% and the breadth decreases by 4%, then, the error percentage in the area calculated from these measurements is

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