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Yogita Ingle 5 years, 11 months ago
If your question is"Find the centre of a circle passing through the points (6,-6), (3,-7) and (3,3)." than the solution is-
Let A (6, –6), B (3, –7) and C (3, 3) be the points on the circle and the centre of the circle be P (h, k).
∴ PA = PB = PC (Radius of the circle)

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Yogita Ingle 5 years, 11 months ago
A device that utilises solar energy for cooking purposes is called a solar cooker. The most commonly used form of solar cooker is known as box-type solar cooker. A box-type solar cooker is shown in the figure.
Construction of a box-type solar cooker: A box-type solar cooker consists of the following components:
- Box (B): This is an insulated metal or a wooden box. It is painted black from inside because black surface absorbs more heat. The box may be provided with four roll-wheels.
- Glass cover (G): A cover made of two sheets of toughened glass held together in an aluminium frame is used as a cover of the box B.
- Plane mirror reflector ®: A plane mirror reflector fixed in a frame is fixed to the box B with the help of hinges. The mirror reflector can be positioned at any desired angle to the box. The mirror is positioned so as to allow the reflected sunlight fall on the glass cover of the box.
- Cooking containers ©: A set of containers made of aluminium and blackened from outside are kept in the box B. These containers are also painted black because black surface absorbs more heat.
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2 important uses-
1) It is used in making baking powder.
2)It is used in soda -acid fire extinguisher.
Posted by Isha Sharma 5 years, 11 months ago
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Eshita Saha 5 years, 11 months ago
0Thank You