An electrical pole of 12 m height is stretched by a string of 20 m. Find the distance between the foot of the pole and the end point of the string on the ground?
- 16m
- 18m
- 20m
- None of these
Explanation
Let's use the Pythagorean theorem:
Height of pole (perpendicular) = 12m
Length of string (hypotenuse) = 20m
Distance between foot of pole and end point of string (base) = √(hypotenuse² - perpendicular²)
= √(20² - 12²)
= √(400 - 144)
= √256
= 16m
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