Home PDF Store Exams G.K. Aptitude Reasoning English Computer Biology Privacy About Contact

Subscribe TechModgy to learn about new technologies!

A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is ?

A. 27%

B. 28%

C. 29%

D. 30%

Study and Earn Android App

Share this question with your friends

Correct Answer : B.

Let original length = x
and original width = y
Decrease in area will be

= x y - (\frac{80 x}{100} \times \frac{90 y}{100}) = (x y - \frac{18}{25} x y) = \frac{7}{25} x y D e c r e a s e = (\frac{7 x y}{25 x y} \times 100) % = 28 %

Comment

Also checkout

Percentage MCQ Angiosperms (Inflorescence, Flower and Fruit) MCQ Pteridophyta MCQ Wound Repair And Care MCQ Statement & Assumption MCQ Building Materials MCQ Numbers MCQ Civil Engineering MCQ Current Affairs June 2017 MCQ Rearrangement Set 5 MCQ Decimal Fraction MCQ Rearrangement Set 8 MCQ