Ankur sells a box to Sunita earning a profit of 20%. Sunita sold it to Mohit with a 9% profit. Mohit sold it to Anjali for ₹24,525 thereby gaining 25%. At what price (in ₹) did Ankur buy the box?
The simple interest on a certain sum at the rate of 12.5% p.a. for 3 years and 6 months is ₹6,750 less than the principal. Find out the principal.