A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width of
the river. If the length of the bridge is 100 metres, then the width of the river is
(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m

Question

A bridge, in the shape of straight path, across a river, makes
an angle of 60ï€¸ with the width of
the river If the length of the bridge is 100 metres, then the width
of the river is
(A) 50 m (B) 173 2 m (C) 43 3 m (D) 100 m

Ajanta Trivedi · Accepted Answer

let AB be the width of the river and AC be the bridge in the triangle ABC, $\cos 60 = \frac{A B}{A C} \frac{1}{2} = \frac{A B}{100} \Rightarrow A B = 50 m$ hence the width of the river is 50 m

A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width ofthe river. If the length of the bridge is 100 metres, then the width of the river is(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m

A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width of
the river. If the length of the bridge is 100 metres, then the width of the river is
(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m