Question
 If the simple interest for 5 years is equal to 20% of
the principal, then the interest will be equal to the principal after ________ years.Solution

Find the length of AB, if ΔABC ~ ΔRQP and AC = 22.5 cm, RP = 9 cm and RQ = 6 cm.
- The base of a right pyramid is an equilateral triangle with side 10 cm. If the height of the pyramid is 55√3 cm, calculate the volume of the pyramid.
If two triangles PQR and STU are congruent, then which of the following statement(s) is/are true?
I. PQ = ST
II. ∠PQR = ∠STU
- Determine the perpendicular drawn from a vertex to the opposite side in an equilateral triangle with side length 8√3 cm.
Find the length of AC, if ΔABC ~ ΔRQP and AB = 10 cm, RQ = 8 cm and RP = 12 cm.
Find the hypotenuse of an isosceles right-angled triangle where each of the equal sides is 7√5 cm.
- In triangle ABC, DE is drawn parallel to side BC. If AD = 6 cm, DB = 4 cm and AE = 9 cm, then find AC.
Area of a triangles with vertices at (2, 3), (-1, 0) and (2, -4) is :
- The base of a right pyramid is an equilateral triangle with side 8 cm. If the height of the pyramid is 36√3 cm, determine the volume of the pyramid.
An equilateral triangle ABC is surmounted on a square BCDE whose area is 500 cm². Find the altitude of triangle ABC.