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The reduction ratio for grinders is defined as (where, Df and Dp are average diameters of feed and product respectively).

The reduction ratio for grinders is defined as (where, Df and Dp are average diameters of feed and product respectively). Correct Answer $$\frac{{{{\text{D}}_{\text{f}}}}}{{{{\text{D}}_{\text{p}}}}}$$

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The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).
In a company there are 252 engineers, in which the ratio of the number of electronics engineers and computer engineers is 2 ∶ 1. The ratio of the number of electronics engineers and computer engineers becomes 1 ∶ 1 after recruitment of some more computer engineers. The average age of all the engineers is now 22 years and the average age of the computer engineers is 2 years less than the average age of electronics engineers. (A) The average age (in years) of electronics engineers is 21 (B) The average age (in years) of computer engineers is 21 (C) The average age (in years) of electronics engineers is 23 (D) The average age (in years) of electronics engineers is 25 (E) The average age (in years) of computer engineers is 23 Choose the correct answer from the options given below: 
Questions below followed by three quantities. Find the relationship between them. Quantity I: Average age of 14 members of team is 25 years. While oldest member of the team is 26 years older than youngest member of the team. Out of remaining 12 members of team, average age of six members of team is 28 years and the remaining six members is 20 years. What is the age of oldest member of the team? Quantity II: Average age of Nitu, Rekha and Shyam is 17 years. Two new persons Divya and Raju joined them so that average age of all become 19 years. If Divya is 2 years older than Raju and Rekha is 2 years older and 1 year older than Shyam and Nitu respectively. What is sum of the average age of Nitu and Shyam together and average age of Divya and Rekha together? Quantity III: The average age of father, mother and their two sons is 27.5. Five years ago, the ratio of ages of father, mother and two sons (elder and younger) is 7 : 5 : 2 : 1. Find the sum of ages of two sons after 7 years.
Questions below followed by three quantities. Find the relationship between them. Quantity I: In a class with a certain number of students if a teacher weighing 78 kg is added, then average weight of class is increased by 2 kg. If one more teacher weighing 66 kg is added, then the average weight of the class increases by 3.5 kg over the original average. What is the original average weight (in kg) of the class? Quantity II: The average age of 16 students and their teacher's age is 16 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age? Quantity III: Average weight of three friends A, B and C is 46 kg. Another person D joins the group and now the average is 45 kg. If another person E whose weight is 6 kg more than D, joins the group replacing A, then average weight of B, C, D and E becomes 47 kg. What is the weight of A (in kg)?
Two stores A and B bought the same product from the company at the same price. Store A marked the price of the product 50% above its cost price and offered two successive discounts of 15% and 10% on the marked price of the product, while store B marked the price of the product 60% above its cost price and offered two successive discounts of 15% and 12% on the marked price of the product. If a customer buys the product from store B, he has to pay Rs. 986 more than that at store A. At what price the two stores bought the product from the company?
There are three taps of diameters 1 cm, 4/3 cm and 2 cm respectively. The ratio of the water flowing through them is equal to the ratio of the square of their diameters. The biggest tap can fill the tank alone in 61 min. If all the taps are opened simultaneously, then how long will the tank take to be filled?
Which of the following statement (s) is/are true about the following eliminations? (1) Hoffmann product is major product in I (2) Saytzeff product is major product in I (3) Hoffmann product is major product in II (4) Saytzeffproduct is major product in II
The average of eight batsmen J, K, L, M, N, O, R, and T is compared. The number of batsman having average less than L are same as the number of batsman having average more than M. Average of T is less than M and more than K. Average of L is less than K. Average of two batsman lies between the average of M and L. Average of O is less than N and K both. Which of the following can be the correct sequence of their averages?
A dealer bought a product and sold it to a shopkeeper, who further sold it to a customer, such that the dealer and the shopkeeper marked the price of the product 25% and 40% above the cost price respectively, and sold the product giving a discount of 10% and 25% respectively. If the dealer bought the product for Rs. 1680, at what price did the shopkeeper sold the product to the customer?
In the following question, two statements are numbered as A and B. On solving these statements we get quantities A and B respectively. Solve for the both quantities and choose the correct option. Quantity A: A shopkeeper marks the price of his product 20% above its cost price and sells it at a discount of 10%. If he earns a profit of Rs. 120, what is the cost price of the product? Quantity B: A product is successively sold twice earning a profit of 10% and 20% respectively. If the original cost price of the product is Rs. 1050, what is the final selling price of the product?