Question
35% of 45% of 640 = z + 20.2, what is the sum of the
squares of the digits in ‘z’?Solution
ATQ,
35% of 45% of 640 = z + 20.2
Or, (7/20) × (9/20) × 640 = z + 20.2
Or, 100.8 = z + 20.2
Or, z = 80.6 → Take only digits: 8, 0, 6
Required sum = 8² + 0² + 6² = 64 + 0 + 36 = 100
In a zoo, 30% of the people are males. 50% of the remaining are females and the remaining 630 are children. Find the total number of people in a zoo.
Perimeter of a square is equal to perimeter of a rectangle, if area of square is 324 sq.cm and length of rectangle is two times that of breath. Find the...
If sum of all interior angles of a polygon is 2520, then number of sides of that polygon is
The ratio of males and females in a zoo is 6:7 respectively and the percentage of children among males and the percentage of children among females are ...
Find the circumference and area of a circle with radius 21 cm. Take π = 22/7.
Measure of each interior angle of a regular polygon can never be?
A copper wire is bent in the form of a square with an area of 121 cm². If the same wire is bent in the form of a circle, the area of the circle will be...
A circular pond is surrounded by a path 2 meters wide. The diameter of the pond is 28 meters. Find the cost of constructing the path at ₹140 per squar...
The area of a square is 361 cm². Find the ratio of its area to that of a rectangle whose breadth is 20% more and length 50% more than the side of the s...
The altitude of an equilateral triangle is 6√3 cm. Find the area of the equilateral triangle.
