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Two poles of height 6m and 11m stand vertically upright on a plan ground.

If the distance between their feet is 12m the distance between their feet top is

Class: 10

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12m

14m

13m

11m

answer is C.

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Detailed Solution

let AB and CE are two poles
AE is the distance between the top of poles
In Δ ADE
AE2 = AD2 + DE2
AE2 = 122 + 52
= 144 + 25 =169
AE2 = 132
AE = 13

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