Page 79 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - CITS

Semi circle

1 Calculate the circumference and area of semi circle whose radius is 14 cm.
2 Find area of the given figure.

Circular ring

1 Find out area of a ring washer, whose inner radius and outer radius are 13 cm and 15 cm respectively.
2 Find the area of a ring portion of a washer whose outer dis is 30 m and inner dis is 20 m. Also calculate the
difference between the circumference of circles.

Sector of circle
1 Find the perimeter and area of a sector of a circle of radius 5cm and its angle is 96°.
2 Find the radius of the circle if the angle is 90° and the area of sector of a circle is 196 cm².
Hexagon
1 Find out the Area, perimeter, DAF,and DAC of hexagon of side 4cm.

2 Find the area of cross section of a regular hexagon rod whose side is 7.5 cm.
Ellipse
1 Find the area of the biggest ellipse that can be inscribed in a rectangle of length 18 cm and breadth 12 cm.
Also calculate its perimeter.

2 How much fencing will be required to enclose an elliptical plot of ground the axes of the ellipse being 200 and
170 meter respectively.

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CITS : WCS - Electrical - Exercise 5