Question
The population of a city is decreased by 12% in the
first year and then increased by 25% in the second year. Find the population of the city at the end of the second year, if two years ago the population was 20,000.Solution
Required population = 20000 × 0.88 × 1.25 = 22000
Calculate the volume of a sphere whose diameter measures 21 cm. (Take π = 22/7)
- A water tank is shaped like a right circular cylinder with a height of 10 cm and a base radius of 2.8 cm. What is its volume? (Use π = 22/7)
- If the curved surface area of a cylindrical drum is 660 cm² and its height is 10 cm, then find the diameter of the drum.
The length of a rectangle is 15 cm more than its width. If the area of the rectangle is 240 cm², what is the perimeter of the rectangle?
A cone has a height of 28 cm. A sphere is melted to form this cone. If the radius of the sphere is 7 cm, find the radius of the base of the cone.
A girl spent 20% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 3:2. If the difference of the income ...
The perimeter of 4 squares is 28 cm, 36 cm, 40 cm and 56 cm respectively. What will be the area of the square having perimeter equal to sum of edges of ...
The area of four walls of a room is 140 cm2. If the length and breadth of the room were equal and the height of the room is 5 cm, then what i...
Angle bisectors of Q and R meet at point S, inside the triangle PQR. If angle QSR = 126˚ , then the measure of angle P is:
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...
Relevant for Exams:
