Question
A hollow cylindrical pipe has an inner radius of 8 cm. If
the length of the pipe and the thickness of the pipe are 12 cm and 2 cm, respectively, determine the approximate volume of the pipe. (Use π = 22/7)Solution
ATQ,
Outer radius of the pipe = 8 + 2 = 10 cm
Volume of the pipe = π × height × [(outer radius)² - (inner radius)²]
= (22/7) × 12 × (10² - 8²)
= (22/7) × 12 × (100 - 64)
= (22/7) × 12 × 36
= 1,123.71 cm³ or 1124 cm³
A seller priced a bag of rice 50% higher than its cost price and later sold it after applying a 20% discount. If the profit made by the seller was Rs. 4...
A has bought a few items from the interest he earned from the investment in PNB. A has marked up the items by 11(1/9)% above the cost price. Find out th...
Selling price of article ‘A’ when sold at a profit of 20% is Rs. 150 more than its selling price when sold at a loss of 30%. If the cost price of ar...
An article is marked 25% above its cost price and sold after offering a discount of Rs. 30 such that its selling price is Rs. 50 more compared to its se...
A jeans is listed at Rs. 2,500 and the discount offered is 15%. What additional discount must be given to bring the net selling price of Rs. 1,950?
- A product is tagged at 50% above its cost price and is sold after a discount of 30% on the marked price. If the selling price comes to Rs. 2,730, find the ...
Article ‘P’, if sold at a profit of 35% earns a profit of Rs. 700. If article ‘P’ is marked 30% above its cost price and then sold after offerin...
The selling price of the book is 25% more than the selling price of the bag and the selling price of the bottle is 30% less than the selling price of th...
The sum of the income of Raj and Roni is Rs. 168000. A spends 50% of his income and B spends 75% of his income in such a way that B’s saving is Rs. 90...
A shopkeeper earns a profit of 30% by selling an article. What would be the approximate percent change in the profit percent, if he had paid 20% less an...
Relevant for Exams:
