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CBSE Class 10 Answered

numerical
Asked by anmol11_batra | 19 Nov, 2009, 05:35: PM
answered-by-expert Expert Answer

Dear Student

if the mirror is 20cm high,and the tree image completely fills the mirror  ==>  Angular height fo mirror and tree at at eye is same.

Say distance between mirror and tree  =  d

Tan θ = opposite side /adjescent side=  0.2/ 1  =0.2

The other way Tan θ =15/ ( d+1) =  0.2

d+1= 15/0.2 =75  ==>  d=  74 m

==>  the distance between the eye and tree=  74-1 = 73m

Regards

Team

Topperlearning

Answered by | 13 Jan, 2010, 03:42: PM

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