AP question, help needed (1 Viewer)

[haack_m]

ok here it is, its from an old trial

Jane finds out that she is able to lift close to 50kg. She lifts 20kg on the first day and the weight she adds each day is x times that of the previous day (0<x<1). Presumming she cannot left more the 50kg, find the value of x.
btw, from pervious qns, n=28
cheers

 

[azza_3761]

Tn = a +(n-1)x
T28 = 20 + 27x
50 = 20 + 27x
30 = 27x
x = 10/9