Question
A number is increased by 45% and then decreased by 30%.
What is the overall percentage change (increase or decrease) in the number?Solution
Let the number be '100y' Final number = 1.45 X 0.7 X 100y = 101.5y Therefore, percentage increase = [(101.5y - 100y) ÷ 100y] = 1.5%
A right circular cylinder having total surface area of 2710.4 cm2 is immersed in a vessel completely filled with water. If the height of the ...
There is a rectangular paper, whose length and breadth are in the ratio 6:5, respectively and it has a perimeter of 44 metres. If a triangular piece wit...
Two paths of width 5 metres are to be made in the centre of rectangular field such that they are perpendicular to each other. Find the area (in m2<...
The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hour...
The radius of the base of a solid right circular cylinder is 7 cm, and its height is four times the radius of the base. Determine...
The length of sides of a square is twice the radius of a circle and perimeter of a rectangle is half the perimeter of the square. If the sum of length a...
A square whose diagonal is 12 √2 cm is made base of the pyramid. if height of the pyramid is 18cm, then what is the total surface area of the pyramid....
The perimeter of a rectangular field is 44 metres and its area is 114 m2 . What is the length of the diagonal of this field?
Measure of each interior angle of a regular polygon can never be?
Some balls are to be distributed among some boys. If 5 more balls are available, each boy gets 8 balls. If 6 less balls are available, each boy gets 4 b...
Relevant for Exams:
