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ragav kavi

· started a discussion

· 1 Months ago

wrong answer (Question: 107303.0 )

answer is wrong it should be 6250

Talented Boy

· commented

· 1 Months ago

6250 is correct answer........we fixed it...
ragav kavi

· started a discussion

· 1 Months ago

wrong answer (Question: 107303.0 )

answer is wrong it should be 6250

Question:
A sum of money invested at simple interest amounts to 31,250 in 4 years. if the interest at the end of 16 years is same as the sum invested then interest at the end of 4 years was.
Options:
A) 6,350
B) 6,250
C) 5,790 
D) 7,120
E) None of these
Solution:

Ans (b) 

Let P be the principal and x be interest for 1 year 

Interest for 16 years = 16x

Now

16x = P ⇒ x = \(\cfrac{p}{16}\) = 6.25% of p

Interest for 4 years = 4 × 6.25% of 

P = 25% of P

31250 =  P + 25% of P = 125% of P = 5/4 P

P = 31,250 × \(\cfrac{4}{5}\) = \(\unicode{x20B9} \)25,000 

Interest for 4 years 

= 31250 - 25000 = 6,250

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