Question
A hollow cylindrical drum has an internal radius of 4.8 cm.
If its length is 18 cm and the thickness is 2.5 cm, calculate the volume of the drum. (Use π = 3.14)Solution
ATQ,
Outer radius of drum = 4.8 + 2.5 = 7.3 cm
Volume of hollow cylinder = π × height × [(outer radius)² - (inner radius)²]
= 3.14 × 18 × (outer radius + inner radius) × (outer radius - inner radius)
= 3.14 × 18 × (7.3 + 4.8) × (7.3 - 4.8)
= 3.14 × 18 × 12.1 × 2.5
= 3.14 × 18 × 30.25
= 1,708.05 cm³
When the profit obtained by selling an item for Rs. 768 is the same as the loss suffered when the item is sold for Rs. 312. What ...
If the angular diameter of the sun is 20, how far from the eye a coin of radius 3.3 cm be kept to hide the sun?
A shopkeeper bought two article A&B for a total of rupees 3500. He marked Article A 140% above its cost price and sold it after giving a discount of 20%...
The sum of 6 consecutive odd numbers is 156. What will be the product of first number and the last number?
The number 8192 is which term in the following geometric sequence 2, 8, 32, 128, . . . . . . .
The cost of an item is 'A'. A shopkeeper increases the price by 'x'%, then applies a discount of 'd'% on the increased price. Aft...
The sum of three numbers is 226. If the ratio of the first to the second is 4:5 and that of second to the third is 7: 10 then the second number is?
What is the median of the following list of numbers: 5, 3, 6, 9, 11, 19,12,20, and 1?
The current age of Anupama is 25% greater than Chinky's age. Four years ago, the ages of Beena and Chinky were in the ratio of 4:...
Two different alloys contain steel and aluminum in the ratios of 11:4 and 2:13, respectively. In what proportion should these two alloys be combined to ...
Relevant for Exams:
