2 years ago in Percentage

# The actual area of a rectangle is 60 Cm2, but while measuring its length a student decreases it by 20% and the breadth increases by 25%. The percentage error in area, calculated by the student is :

[A] 5%
[B] 15%
[C] 20%
[D] No change

## Overall Stats

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Incorrect 3
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suchita tiwari - 1 month ago

suchita tiwari is saying 20% is correct answer

Chhavi Jain - 2 years ago

Chhavi Jain from Jaipur, India is saying 5% is correct answer

Francis Rai - 2 years ago

Francis Rai from Assam, India is saying 15% is correct answer

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• [A] X% of Y
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### Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is

• [A] 5,00,000 kg
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### The length, breadth and height of a room are in ratio 3:2:1. If breadth and height are halved while the length is doubled, then the total area of the four walls of the room will

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• [B] decrease by 13.64%
• [C] decrease by 15%
• [D] decrease by 18.75%
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### A fraction in reduced form is such that when it is squared and then its numerator is reduced by 33(1/3)% and denominator is reduced to 20%, its result is twice the original fraction. The sum of numerator and denominator is:

• [A] 8
• [B] 13
• [C] 17
• [D] 15
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