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Shailesh R.
tutor for 1 year
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Trigonometry
TutorMe
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.
Answer:

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.
Answer:

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.
Answer:

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

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