Question
4 years ago, the average age of a family of six persons
was 30 years. In between these 4 years the family adopted a girl. Now at present the average age of the family is same as it was 4 years ago. Find the present age of the girl.Solution
Sum of the present age of the family excluding girl = 6 x (30 + 4) = 204 years Sum of the present age of the family including girl = 7 x 30 = 210 years Present age of the girl = 210 – 204 = 6 years
Consider two concentric circles having radii 17 cm and 15 cm. What is the length (in cm) of the chord, of the bigger circle, which is a tangent to the s...
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In the given figure CD is parallel to AB then ∠y is?
If O is circumcentre of acute angled triangle ABC, if ∠ OBC = 150 then ∠BAC = ?
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The radius of the incircle of a triangle is 8 cm. if the area of the triangle is 56 cm 2 , then its perimeter is?
The internal bisector of ∆ABC at ∠A cuts BC on D and cuts the circumcircle at E. If DE = 6cm, AC = 8cm and AD = 10 cm, then find the length of AB?
Find the area of triangle having sides 5 m, 6 m, and 9 m.
