Laterite is found in

The wedging is adopted for quarrying costly stratified rock such as

Refractory bricks are used for

Pick up the correct statement from the following:

Mastic asphalt is

Minimum of 40% of iron, is available in

Mild steel is used for

Pick up the rock which is not a sedimentary rock from the following:

A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called