You can use a tangent:

We have opposite = 17 and adjacent = x.

substitute:
cross multiply
multiply both sides by √3

divide both sides by 3

Use the Pythagorean theorem:

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Other method.
triangle.
The sides are in the ratio 
Therefore

X(^-1)^7=x^6
7(c^1)^2/3=7(c)^2/3
(m^2n^3)^-3=1/m^6n^9
340 × .2 = 68
68 page decrease
340 - 68 = 272
272 pages left
9 hours and 35 min.
11:50 - 2:15
0=1. The answer is No Solution.