What is the rate of interest percent per annum? I. An amount doubles itself in 5 yr on imple interest, II. Difference between the compound interest and the simple interest earned on a certain in two years is Rs.400. III. Simple interest earned per annum is Rs. 400.A. Only IB. II and IIIC. Any two of threeD. Only I or II and III

What is the rate of interest percent per annum? I. An amount doubles i

1.	What is the rate of interest percent per annum? I. An amount doubles itself in 5 yr on imple interest, II. Difference between the compound interest and the simple interest earned on a certain in two years is Rs.400. III. Simple interest earned per annum is Rs. 400.A. Only IB. II and IIIC. Any two of threeD. Only I or II and III
Answer» From, I, If P = 100 `A=200 and SI=200-100=100` Rate `=(SIxx100)/(PxxT)=(100xx100)/(2000xx1)=20%` From II and III, Rate `=(400xx100)/(2000xx1)=20%` Hence either I alone or II + III will be sufficient.

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