Question

A bridge across a river makes an angle of 45° with the river bank.If the length of the bridge across the river is 200 metres. what is the breadth of the river?​

Answer 1

Answer:

In right triangle ABC, we have

sin45

∘

=

AC

BC

⇒

2

1

=

150

BC

⇒BC=

2

150

⇒BC=75

2

m

Hence, the width of the river is 75

2

m metres.