Question
The radius of a circle is x meters, and the side of a
square is x + 5 meters. If the sum of the circumference of the circle and the perimeter of the square is 91.96 meters, find the area of the circle (in m²).( π = 3.14)Solution
Circumference of the circle = 2πx. Perimeter of the square = 4(x + 5). From the data: 2πx + 4(x + 5) = 90. Substitute π = 3.14: 2(3.14)x + 4x + 20 = 91.96 6.28x + 4x + 20 = 91.96. 10.28x = 71.96. x = 71.96 / 10.28. x = 7 meters. Area of the circle = πx². πx² = 3.14(7)². = 3.14 × 49. = 154 Correct option: a
17                          26                          37                   �...
Three series are given below. You have to find the values of P, Q and R, then establish a relationship among them.
I:Â Â 840, P , 584, 456, 5...
If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...32    54    98    186    ?     714
What will be the next number in the series?
2,5,11,23,47,?
14, 7.5, 8.5, 14.25, 30.5, ?
8Â Â Â Â 20Â Â Â Â 36Â Â Â Â Â 56Â Â Â Â Â 80Â Â Â Â ?
12, 24, 72, 288, 1440, ?
13, 14, 18, 27, 43, ?
8, 9, 15, ?,82.5, 250.50
