Answered

To dig a well, a company charges P80 for the first foot, P100 for the second foot, P120 for the third foot, and so on. The cost of each foot is P20 more than the cost of the preceding foot. What is the depth of a well that cost P23,400 to dig?

Sagot :

Jomastarviz
To get the depth of the well that cost P23,400:
23,400 - 80 = 23,320
23,320/20 = 1166
1166 + 1 = 1167
Therefore, the depth of the  well is 1167 ft.