A mason has made a concrete slab. He needs it to be rectangular. It what different ways can he make sure that it is rectangular?

A mason has made a concrete slab. He needs it to be rectangular. In what different ways can he make sure that it is rectangular?

A mason has made a concrete slab .He needs it to be rectangular . In what different ways can he make sure that it is rectangular ?

Uma has made a sweet chikki .She wanted it to be rectangular .In how many different ways can she verify that it is rectangular?

A student performs the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He measures the angle of incidence anglei , angle of refraction angler and angle of emergence angle e for all his observations. He would find that in all cases :

A student is Instructed to answer any 8 out of 12 questions. How many different ways he can choose the questions?