1.

If The Interest Is Payable Annually Than The Principal On Which The Compound Interest For 3 Years At 10% P.a Is Rs 33/- Is Given By?

Answer»

Let the principal be Rs X

Then X × (1 + 10/100)3 – x = 331 

=> (x × 11/10 × 11/10 × 11/10 - x) = 331

=> ((1331x-1000x)/1000) = 331 

=> 331x = 331000 

=> X = 1000 

HENCE the principal is Rs 1000.

Let the principal be Rs x. 

Then X × (1 + 10/100)3 – x = 331 

=> (x × 11/10 × 11/10 × 11/10 - x) = 331

=> ((1331x-1000x)/1000) = 331 

=> 331x = 331000 

=> X = 1000 

Hence the principal is Rs 1000.



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