A swimmer starts from a point on one end of the bank of the river. He swims in a straight line inclined to the bank of the river at 55° and reaches to the opposite bank. If he covers a total distance of 40m, then find the width of the river?
Options
a) 60.12m
b) 45.89m
c) 24.42m
d) 30.09m
Answers
Given : a swimmer starts from a point an one end of the bank of river he swims in a straight line inclined to the bank of the river at 55° and reaches to opposite bank
he covers a total distance of 40 m
To Find : the width of the river
Solution:
Ignoring river flow
straight line inclined to the bank of the river at 55°
=> Sin 55° = Width of River / Total Distance covered
=> 0.819 = Width of River / 40
=> Width of River = 32.76 m
width of the river = 32.76 m
none of the given option is correct .
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