Due to fall of 10% in the rate of sugar, 500 gm more sugar can be purchased for Rs. 140. Find the original rate?

Explanation:-

Money spent originally = Rs. 140.
Less Money to be spent now,
= 10% of 140
= Rs. 14
Rs. 14 now yield 500gm sugar.
So, Present rate of sugar = Rs. 28 per kg.
If the present value is Rs. 90, the original value
= Rs. 100.
If the present value is Rs. 28 the original value,
= Rs. (1 0 0/9 0)*2 8 = Rs. 31.11.