Question

ritu has borrowed some money at 12% pre annum. she had to pay 180 rupees as interest after 3 years . what sum did she borrow

Answer 1

P=100I÷nr=100×180÷3×12=500

Answer 2

R=12%
I=180 rupees
T=3 years 
 Sum =( I x 100)/(R X T)
         = (180 x 100)/(12 x 3)
         = 18000/36
         =500 rupees