Q. 3 D5.0( 2 Votes )

# <span lang="EN-US

We have to find the height of 2nd building is which is 1st building + ED

We know that Tanθ =

From, triangle CED we can write Tan 45° =

1 =

ED = 10 cm.

Height 2nd building is 1st building + ED

Height 2nd building = 20 + 10 = 30 cm.

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