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Muskan

· started a discussion

· 1 Months ago

200 divided by 800 and multiply by 100 ..........by option trick

Knowledge Expert

· commented

· 1 Months ago

Dear Student,
Yes, you can do by the option elimination method also. It will help you to save your time in examination.
Keep learning with us.
Thank You
Team Toprankers
manoj kumar

· started a discussion

· 1 Months ago

Solve kare

Question:
A dishonest shopkeeper sells his goods at cost price. If he uses a faulty scale, he earns 25% profit. Find out what weight does he use in place of 1 kg weight.
Options:
A) 800 
B) 889
C) 881 
D) 772
E) None of these
Solution:

C.P. of 1000 gms = 1 

S.P. of x gms = 1

S.P. of 1000 gms

= \(\cfrac{1000 × 1}{x}\) = \(\cfrac{1000}{x}\)

P% = 25%

P% = \(\cfrac{P}{C.P.}\) × 100

P% = \(\cfrac{S.P. – C.P.}{C.P. }\) × 100

25 = \(\cfrac{\cfrac{1000}{x} - 1}{1}\) × 100

25 = \(\cfrac{1000 - x}{x}\) × 100

\(\cfrac{25x}{100}\) = 1000 – x

\(\cfrac{x}{4}\) = 1000 – x

x = 4(1000 - x)

x + 4x = 4000

5x = 4000

x = \(\cfrac{4000}{5}\) = 800


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