From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate________?

In compressed air tunneling, the volume of free air provided is________?

Minimum pitch provided in riveted steel tanks is________?

The type of roof suitable in plains where rainfall is meagre and temperature is high is________?

When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as________?

A machine costs Rs. 20000 and its useful life is 8 years. The money is borrowed at 8% interest per annum. The capital recovery factor at 8% interest per annum for 8 years is 0.174. The annual equipment cost of the machine will be________?