Question number 4 and 5 with explanation needed

Dear Student

The solution to your 2nd query has been provided below:
Height of the tree is 60 ft.  Given data :  Object height and shadow length ratio in that lighting condition is = 4:1.  Length of the tree's shadow = 15 ft.  Let,the length of the tree = x ft.So,        length of the treeLength of the tree's shadow=41   x15=4  x=15×4=60 ft.Hence, height of tree is 60 ft.
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