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RAKESH KUMAR

· started a discussion

· 1 Months ago

1 (Question: 232819.0 )

keu shortcut dite parbe

Question:
If the compound interest on a sum for 2 years at \(12\cfrac{1}{2}\) % per annum is Rs.510, the simple interest on the same sum at the  same rate for the same period of time is: 
Options:
A) Rs.400
B) Rs.480
C) Rs.450
D) Rs.460
Solution:

Ans: (b)

ponnada jnana sagar

· commented

· 1 Months ago

Rrao Sahab sir... Thanks for letting us know the shortcut.

rao sahab

· commented

· 1 Months ago

Rate =25/200 =1/8
Let P=64
Intersrt first year 8 (SI)
2nd year interest 8+1 (SI+CI)
Total CI =17 ; acc to question 510; on multiplication of 30
Total SI=16 MULTIPLY BY 30= 480
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