Regulation of population size modulated by

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#Question id: 12846

#General Aptitude

O is the centre of the circle and <AOB = 150°, and the shaded portion is x part of the circular region, then x = ?

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#Question id: 12847

#General Aptitude

Diagonals of a Trapezium ABCD with AB || CD intersect each other at the point O. If AB = 2CD, then the ratio of the areas of  Triangle AOB and  triangle COD is

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#Question id: 12848

#General Aptitude

D and E are points on the sides AB and AC respectively of DABC such that DE is parallel to BC and AD : DB = 4 : 5, CD and BE intersect each other at F. Then find the ratio of the areas of DDEF and DCBF.

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#Question id: 12849

#General Aptitude

The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

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#Question id: 12850

#General Aptitude

A plate on square base made of brass is of length x cm and width 1 mm. The plate weighs 4725 gm. If 1 cubic cm of brass weighs 8.4 gram, then the value of x is :

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#Question id: 12851

#General Aptitude

The length of two parallel sides of a trapezium are 15 cm and 20 cm. If its area is 175 sq.cm, then its height is :