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140/100 × 9/8 × ? = 108/100 × 2800 ? = 12 × 2 × 8 × 10 ? = 1920
How long will a sum of money take to double, if it is invested in 9% p.a. simple interest?(approx).
A sum of Rs.8 is lent to be returned in 9 months installments of Rs.1 each, interest simple. The rate of interest is: -
The difference between compound interest and simple interest at the same rate for Rs. 2400 for 2 years is Rs. 216. The rate of interest per annum is: