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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?
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- initial area=lb
new area=0.8*0.9*lb
decrease in area=initial area-new area=0.28lb
28% - 9 years agoHelpfull: Yes(1) No(0)
- a=l*b
a(mf)=l(mf)*b(mf) where mf stands for multiplying factor
now,
l is reduced by 20%
therefore its multiplying factor will be 4/5
b is reduced by 10% its multiplying factor will be 9/10
a(mf)=4/5*9/10
a(mf)=18/25
% reduction in area is 7/25*100=28%.
- 9 years agoHelpfull: Yes(1) No(0)
- 28% decrease in area of towel
- 9 years agoHelpfull: Yes(0) No(0)
- -20-10+200/100= -28%
- 9 years agoHelpfull: Yes(0) No(0)
- Suppose towel completely 100% length and breadth
It's length decreases by 20%
So 100*20/100=80%
After that decrease breadth 10%
So. 80*10/100=8%
Total 80%-8%=72%
We are suppose this length and breadth is 100%
Then 100%-72%=28% - 8 years agoHelpfull: Yes(0) No(0)
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