a bridge across a river makes an angle of 45 with the bank of a river. if the length of the bridge is 100m find the width of the river (Take √2=1.414)
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Heya ! Heres your ans
*Let AB = width
AC = length = 200 cm
Angle CAB = 45 °
In triangle ABC
Cos 45° = AB / AC
1/ root 2 = AB / 200
AB= 200/ root 2 = 100root 2
Thus the width is 100 root 2 m . *
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