In the figure, 'O' is the centre of the circle, ZABO= 20°and ZACO= 30°, where A, B, C are points on the circle. What is the value of x ?
120

Given:

Consider the below figure attached with this question.

To find:

The value of x.

Solution:

Draw a line segment OA as shown below.

In triangle ABO,

     [Radii of same circle]

       [Base angles of an isosceles triangle]

In triangle ACO,

     [Radii of same circle]

       [Base angles of an isosceles triangle]

Now,

Central angle is always twice of angle subtended by two points on the circle.

Therefore, the value of x is 100°.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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this is answer of 144 cubic meters