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ATQ, Let ten's digit and unit's digit be x and (x-4) respectively Sum of digits = x + (x-4) = 2x – 4 Let the number be 10x + (x-4) = 11x - 4 (2x – 4) / (11x – 4) = 1/7 14x – 28 = 11x – 4 3x = 24 x = 8 Number is 84 Required number = 84 * 56/100 = 47.04
The volume and height of a cylinder are 2662 cm3 and 7 cm. Find the radius of the cylinder.
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If the ratio of the heights of two cones is 3:2 and the diameters are in the ratio 5:6, what is the ratio of their volumes?
The lateral surface area of frustum of a right circular cone, if the area of its base is and the diameter of circular upper surface is 4 cm and slant he...
A square has an area of 289 cm². The rectangle's breadth is 20% more, and its length is 50% more than the square's side. What is the area ratio of the ...
If 35 grams of sugar is further added to a 20 percent sugar solution, the solution then becomes a 36 percent sugar solution. What was the initial quanti...
Find the area of sector of a circle whose radius is 21 cm and angle subtended by the sector at centre of circle is 45 ° .
