Rs. 1400 amounts to Rs. 2156 in 6 years at a certain rate of interest. If the rate of interest is increased by 1% then Rs. 1400 will amounts to how much ?

For simple interest: 2156-1400=756 is the interest over 6 years. Annual interest = 756÷6=126. Rate = (126×100)÷1400 = 9% per year. If rate increases by 1%, new rate = 10%. New interest = 1400×0.10×6 = 840. New amount = 1400+840=2240. The key is finding the original rate from the first scenario, then applying the increased rate.