What will be the Distance? If
Answer: (b) 17 m.
Height of two poles = 9 m and 17 m
the distance between their feet = 15 m
CDE is a right angle triangle
Therefore, CD = base, CE = perpendicular and DE = hypotenuse
(EC)2 = (CD)2 + (DE)2 ( by Pythagoras theorem)
EC = ?, CD = 15m, DE = 8m
(EC)2 = 152 + 82
(EC)2 = 225 +64
(EC)2 = 289 (square root of both side)
EC = 17m
Hence, the distance between their tops is 17 m.