Consider a rectangular grid of lines formed by m parallel lines intersecting n parallel lines that running perpendicular to them. How many different paths along the grid are possible from the top right corner to the bottom left corner? (where only downward and leftward motion is allowed)
Correct Answer : A
A straight line passes through the point (3, 2) and is perpendicular to the straight line x+ y = 3 and is perpendicular to the straight line x + y = 3. Find its equation
A metallic cuboid has dimensions of 9cm × 10cm × 11cm. How many spherical balls of radius 0.3 cm, can be drawn from this cuboid?