Q. 60 % of the cost price and 40% of the selling price are equal. Find the profit or loss percentage?
S.E.E. Solution
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Soln: Let cp be cost price and sp be selling price, then According given condition, 60% of cp = 40% of sp 0.6cp = 0.4sp sp = (...
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Q. The sum of the ages of a father and his son is 40 years.If they both live until the son becomes as old as the father is now, the sum of their ages will be 96 years . Find their present ages.
The sum of the ages of a father and his son is 40 years.If they both live until
the son becomes as old as the father is now, t ... 
Simplify:
Soln:
... If the curved surface area of cylinder is two-third of the total surface area and radius of its base is 6cm, find the height of the cylinder.
Soln:
2pie.r.h=2/3. 2pie.r(r+h)
h=2/3(r+h)
3h=2(6+h)
3h-2h=12
h=12cm
... 
Prove that: angle AXD = 1/2 (arc AD - arc Bc)
Soln:
Join AC then
angle AXD + angle CAX = angle ACD [External property of a triangle]
angle AXD + (1/2) arc BC = (1/2) arc AD [T ... 
In a cirlce having radius 7 cm, a tangent 25 cm far from the centre is drawn. What is the length of tangent? Find it.
Soln:
use pythagoras theorem in triangle AOB (h^2 = p^2 + b^2)
OB^2 = OA^2 + AB^2
AB^2=25^2-7^2=576
AB=24
... A complete solution for SEE students.
