In measuring the side of a square, an error of 5% in excess is made.
The error % in the calculated area is:
correct answer:-2
A rectangular field of dimension $$180m \times 105m$$ is to be paved by identical square tiles. Find the number of tiles required to cover the field fully leaving no area unpaved.
correct answer:-2
A well with 7 m inside diameter is dug 22.5 m deep and the earth taken out of it has been spread around it to a width of 10.5 m to form an embankment. Find the height of the embankment so formed .
correct answer:-2