[25%] A dishonest dealer uses a scale of 80cm instead of a metre scale and claims to sell at cost price. H

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Aptitude

TNPSC G4

10th CBSE Maths

A dishonest dealer uses a scale of 80cm instead of a metre scale and claims to sell at cost price. His profit is ___ .

10%

25%

35%

40%

Explanation:
In such problems involving dishonest dealer, you know the formula that
Gain % = Error / (True value – Error) x 100In such problems involving dishonest dealer, you know the formula that
Gain % = Error / (True value – Error) x 100
Error = difference between correct scale and false scale = 100 – 80 = 20
True value = Correct scale = 100
Therefore, Gain % = (20/(100 – 20)) x 100
= 25%
Error = difference between correct scale and false scale = 100 – 80 = 20
True value = Correct scale = 100
Therefore, Gain % = (20/(100 – 20)) x 100
= 25%

Additional Questions

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