Book Maths Puzzle Category

How much money must I invest in 20/3 % stock at 10 premium to secure an annual income of Rs.600 ?

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The ratio of Sohini age to the age of her mother is 3:11. The difference of their age is 24 years.what is the ratio of their age after 3 years x+2, x+4, x+3 are lengths of the sides of a scalene triangle and 2x, 4x are the lengths of the sides of a rectangle. If the rectangle and the triangle have equal perimeter then the value of x is __: