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A bridge across a river makes an angle of 30 degrees with the river bank. if the length of the bridge across the river is 98 m, then the width of the river is- |
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Answer» Hi, Here is your answer Given: Angle BRIDGE makes with the river bank=30° Length of the bridge=AC=98m To FIND: Width of the river=BC Solution: CONSIDER triangle ABC Cos 30=adjacent/hypotenuse Cos 30=BC/AC Cos 30=BC/98 Cos30×98=BC BC=√3/2×98 BC=49√3m Hence, the width of the river is 49√3m Hope this HELPS you. |
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