Question
A solid cuboid (rectangular parallelepiped) has
dimensions 20 cm × 16 cm × 12 cm. It is cut into small cubes, each of side 4 cm. How many such cubes are formed?Solution
ATQ, Number of cubes along each edge: Along length: 20 / 4 = 5 Along breadth: 16 / 4 = 4 Along height: 12 / 4 = 3 Total number of cubes = 5 × 4 × 3 = 60
A town’s population increases by 10% in the first year and by 20% in the second year. If the population at the end of the second year is 39,600, find ...
A spent 40% and 25% of his monthly salary on food and rent, respectively. Of the remaining amount, he gave 22% and 44% to his mother and brother, respec...
- Riya spent 40% of her income on groceries and 50% of the remaining on entertainment. If she saves Rs. 1800 after these expenses, what is the amount spent o...
The total number of students in a college is 13,200. If the number of male students increases by 30% and the number of female students increases by 20% ...
 In a lock-making factory, 10 percent of the total produced locks were found to be defective, and 80 percent of the non-defective locks were exported. ...
If 'Y' is 40% of 'X', then 'Y' is what percentage of (X - Y)?
40% of one number is equal to 30% of another number. If the sum of the two numbers is 280, find their difference.
In a competitive examination containing 200 questions, 2 marks are awarded for every correct answer and 1 mark gets deducted for every wrong answer. If ...
- There are 1000 students in a school where the boy to girl ratio is 2:3. If 18% of boys and 12% of girls did not clear the final exam, find the total number...
Person A spends 40% more than what he saves. He allocates 30% of his total spending to cover his rent expenses. If he pays Rs. 2100 as rent, what is his...
