A sum of money amounts to Rs.850 in 3 years and to Rs. 925 in 4 years at some rate of simple interest.The sum is :
1). Rs.550
2). Rs.600
3). Rs.625
4). Rs.700
625
I think it may be right answer
Interest for 1 year
= (925 – 850) = 75
If a sum becomes a1 in t1 years
and a2 in t2 years then rate of
Principal = $\frac{s.i\times100}{time\times rate}$
= 625