A boy, 1.4 metres tall standing at the edge of a riverbank sees the top of a tree on the edge of the other bank at an elevation of 55º. Standing back by 3 metres, he sees it at an elevation of 45º.
(a) Draw a rough figure showing these facts.
(b) How wide is the river and how tall is the tree?
[ sin55=0.8192 , cos55=0.5736 , tan55=1.4281 ]
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Answer:height of tree is 11.4077m
width of river is 7.0077
Step-by-step explanation:given in the pic(including the rough diagram)
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