RRB Group D Model Paper 8 with solutions

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Question : 48 of 100

Marks: +1, -0

The angle of elevation of a ladder leaning against a house is 600 and the foot of the ladder is 6.5 metres from the house. The length of the ladder is

$13/ √3$ metres
13 metres
15 metres
3.25 metres

Solution:

(2)From ΔPQR,

cos60° =

{QR}/{PR}

⇒

1/2=6.5/{PR}

⇒ PR = 13 m

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