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Shailesh R.
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Trigonometry
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Question:

A child is 50 meters from base of tree observes that angle between base and top of tree is 15 degrees. estimate height of tree.

Shailesh R.

by assuming it is like a triangle ABC where A is the place where child is there and B is the base of tree and C is the top point of tree. let h be the height of tree. now by using tan formula tan(15) = h/50 h = 13.39 meters

Civil Engineering
TutorMe
Question:

what is chemical composition of cement

Shailesh R.

cement contains oxides with composition stated below CaO - 60% - 67% SiO2 -17% - 25% Al2O3 - 3.0% - 8.0% Fe2O3 - 0.5% - 6.0% MgO - 0.1% - 4.0% SO3 - 1.3% - 3.0% Alkalies - 0.4% - 1.3%

Algebra
TutorMe
Question:

find distance between points (1,2), (-2,3)

Shailesh R.

distance = sqrt[(1--2)2+(2-3)2] = sqrt[10] =3.16

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