1.

One sees the top of a tree on a bank of a river at an elevation of 70∘ from the other bank. Stepping 20 m back, he sees the top of the tree at an elevation of 55∘. If height of the person is 1.4 m then find the width of river. [tan 70∘=2.75, tan 55∘=1.43]

Answer»

One sees the top of a tree on a bank of a river at an elevation of 70 from the other bank. Stepping 20 m back, he sees the top of the tree at an elevation of 55. If height of the person is 1.4 m then find the width of river. [tan 70=2.75, tan 55=1.43]







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