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The incentre of the triangle formed by the lines 5x - 12y = 0, 3x + 4y = 0 and
y = 15 is:
1. (1, 8)
2. (4, 1)
3. (8, 4)
4. (2, -3)

A wire is in the form of a circle of radius 35cm. If it is bent into the shape of a ...

The curve x = 3 (cos t + sin t) and y = 4 (cos t - sin t) is:
1. a ...

The radius of any circle touching the lines 3x-4y+5=0 and 6x-8y-9=0 is ...

The circle drawn on any focal chord of a parabola as diameter touches: ...

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