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?

Mr. X has a rectangular plot of land of length 16m . He wants to sell a portion of it which will be of the shape of a square of side length equal to the breadth of the rectangular plot in such a manner that the remaining portion is of the area of 100 sq. m . Is it possible?

Mr. Sharma has a rectangular plot of land of length 14 m . He wants to sell a portion of it which will be of the shape of a square of side length equal to the breadth of the rectangular plot in such a manner that the remaining portion of it of the area of 50 sq. m . Is it possible?

An astronaut inside a small space ship orbiting around the earth cannot detect gravity. If the space-station orbiting around the earth has a large size, can he hope to detect gravity?

What is the difference between the displacement produced by a rectangular glass slab in a ray of light and the deviation produced by a glass prism?

A garden has 100 plants. He wants to plant these in such a way that the number of rows and columns remains same. Find the minimum number of plants he needs more for this.

A rectangular coil carrying current is placed in a uniform magnetic field in such a way that normal to the coil makes an angle theta with the direction of magnetic flux density. Find the magnitude of torque acting on the coil Define magnetic moment of a current loop.

A man can swim with a speed of 4.0 km/h in still water. How long does he take to cross a river 1.0 km wide if the river flows steadily at 3.0 km/h and he makes his strokes normal to the river current? How far down the river does he go when he reaches the other bank?