Half cubic metre of gold-sheet is extended by hammering so as to cover an area of 1 hectare. Find the thickness of the gold-sheet.

A solid metal sphere of 6 cm diameter is melted and a circular sheet of thickness 1 cm is prepared. Determine the diameter of the sheet.

One corner of a long rectangular sheet of paper of width 1 unit is folded over so as to reach the opposite edge of the sheet. Find the minimum length of the crease.

A metallic sphere 1 dm in diameter is beaten into a circular sheet of uniform thickness equal to 1 mm. Find the radius of the sheet.

The perimeter of a sheet of tin in the shape a quadrant of a circle is 12.5 cm. Find its area

A thin sheet of glass (mu=1.520) is introduced normally in the path of one of the two interfering waves. The central bright fringe is observed to shift to position originally occupied by the fifth bright fringe. If lambda=5890Å . Find the thickness of the glass sheet.

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: (i) The area of the sheet required for making the box. (ii) The cost of sheet for it, if a sheet measuring 1 m^2 costs Rs 20.

A plastic box 1. 5 m long, 1. 25m wide and 56 c m deep is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: The area of the sheet required for making the box. The cost of sheet for it, if a sheet measuring 1m^2 costs R s .20.

A plastic box 1. 5\ m long, 1. 25\ m wide and 65\ c m deep is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: The area of the sheet required for making the box. The cost of sheet for it, if a sheet measuring 1\ m^2 cost R s .20

A box 3 m long. 62.5 cm wide and 65 cm deep is to be made . It is to be open at the top. Ignoring the thickness of the sheet of which box is made. Determine : area of the sheet required to make the box.

The perimeter of a sheet of paper in the shape of a quadrant of a circle is 75 cm. Find its area