Question
Cost of construction of circular Tower is rupees 4000 fall first 1 m height from the ground, 7004 II 1 m height 10000 rupees for 3rd 1 m height 13000 rupees for the 4th 1 m height 16000 rupees for 51 M height and so on the list of cost of construction is made for 1 m height 2 metre height 3 metre height for me tonight and so on find the arithmetic progression