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Question #023f3

1 Answer

Mar 9, 2017

#11.38# meters

Explanation:

enter image source here

As shown in the figure, #DeltaABC, and DeltaABD# are right-angled triangles.

#=> tan21=x/25, => x=25tan21^@#

#=> tan(21+19)=tan40=y/25, => y=25tan40^@#

shadow length #s=y-x=25tan40-25tan21#
#=25(tan40-tan21)~~11.38# meters

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