Solution: Given,
Two poles AD and CE of height 6 m, 11 m respectively.
Distance between the feet of two poles (DC) = 12 m
AD = BC = 6 m
BE = CE - BC = 11- 6 = 5 m
To prove : Find AE
Proof : According to Pythagoras theorem,
AE2 = AB2 + BE2
AE2 = 122 + 52 = 169
AE = 13.
∴ Distance between the tops of two poles = 13 m