Others Maths Puzzle

4,18,....,100,180,294

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Others Other Question

Due to a 25 % increase in the price of rice per kilogram a person is able to purchase 20 kilograms less for Rupees 400. What is the increased price of rice per kilogram? If increasing 20 by P percentage gives the same result as decreasing 60 by P percentage, what is P percentage of 70 ?

a)50
b)140
c)14
d)35