Others Maths Puzzle

if A's height is 40% less than that of B, how much percent B's height is more than that of A?

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Others Other Question

A person invest sm amount of money at simple interest of 6%/annum.after 3 years she got ₹900 as an interest .if the interest is taken as a compound interest then how much interest she wd hv earned in 3yrs on the same amount nd at the same interest rat LEAST NO OF YEARS IN WHICH A SUM OF MONEY PUT AT 20% CI WILL BE MORE THAN 16 times of it. please tell us the shortest trick