Question
If the area of a circle is equal to the numerical value
of its circumference, what is the radius of the circle?Solution
Area of circle = π r2 Circumference of circle = 2π r ATQ- π r2 = 2 π r r=2 units.
The average of three numbers a, b and c is 2 more than c. The average of a and b is 48. If d is 10 less than c, then the average of c and d is:
A solid metallic sphere of radius 15 cm is melted and recast into spherical balls of radius 3 cm each. What is the ratio of the surface area of the orig...
If the seven-digit number 94x29y6 is divisible by 72, then what is the value of (2x+3y) for x ≠ y?
If √f + (1/√f) = 5, then find the value of f + (1/f).
In an A.P 41st term is 50, then the sum of 81 terms of that A.P is:
If 27 (x+y)³ − 8(x−y)³ = (x + 5y) (Ax² + By² + Cxy), then what is the value of (A+B-C)?
Three cubes of metal whose edges are 3cm, 4cm and 5cm. respectively are melted and a single cube is formed. What is the length of the edge of the newly ...
If √m + (1/√m) = 7, then find the value of m + (1/m).
Two positive numbers differ by 2, and the sum of their reciprocals is 3/4. What is the larger number?
If  a2+2 = 2a
then find a4Â - a3Â + 2a2Â -2a+ 9 = ?
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