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How many meters is the balloon from the starting point on the ground?

Twenty minutes after being launched, a hot-air balloon has risen to an altitude of 300m. The pilot can still see the starting point at a 25 degree angle of depression. How many meters is the balloon from the starting point on the ground?
Please show work.

tan = opp/adj
tan(25) =300/x
x=643.35m
total distance =sqrt(x^2 +(300)^2)
total distance ~710m

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About the Author:

Adrian, the energy metering expert, has been associated for many years with Entity Group company, the Secure Meters, which deals in with Electricity Meters, Energy Audit Services.

Article Source: ArticlesBase.com – Secure Meters Offers Digital Panel Meters