The vertices of a triangle lie on points (0, 4), (3, 5) and (–1, –1) in the X – Y plane. Which of the following is correct about this triangle?

It is an isosceles right triangle

It is a right triangle.

It is an equilateral triangle

It is an obtuse triangle

Correct Answer : D

A metallic cuboid has dimensions of 9cm × 10cm × 11cm. How many spherical balls of radius 0.3 cm, can be drawn from this cuboid?

simplifies to

If ax +by + c = 0 and dx + ey + f = 0 represent the same straight line then which of following is necessarily satisfied?