The angle of elevation of a ladder leaning against a house is $60^{0}$ and the foot of the ladder is 6.5 metres from the house. The length of the ladder is

The angle of elevation of a ladder leaning against a house is $60^{0}$ and the foot of the ladder is 6.5 metres from the house. The length of the ladder is
1). $\frac{13}{\sqrt{3}}$ metres
2). 13 metres
3). 15 metres
4). 3.25 metres

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