The volume of concrete required to build the terrace, if I. the terrace consists of 20 steps each 100 units long. II. each step has a rise of 12m and a breadth of 12m.
A staircase consists of 20 steps. The length and breadth of each step is 100 m and 12 m respectively. The height of the lowermost step is 12 m and the height of the subsequent step increases by 12 m. Find the volume in m3 of the concrete required to make the staircase.