Question

Find the principal amount invested if the difference between Compound Interest and Simple Interest obtained for 3 years at rate of interest of 25% is Rs. 320.

XD ​

Answer 1

Find the principal amount invested if the difference between Compound Interest and Simple Interest obtained for 3 years at rate of interest of 25% is Rs. 320.

Answer

Rs. 1575.38

Answer 2

Draw a line segment BC of any length.

Taking B as the center, construct a semicircle that bisects BC at point P.

From P, construct three arcs dividing the semi-circle into 3 equal parts that are 60º each.

Mark the points as x and y where the arcs bisect the semi-circle.