The ratio of age of A and B after 8 years is 4:5 respectively. The ratio of age of A and C 6 years ago is 3:4 respectively. If the present average age of A and C is 30 years, then find the present age of C.
Let the age of A and B after 8 years be 4x years. and 5x years respectively. And the present age of C is ‘y’ years. So, (4x – 14)/ (y – 6) = 3/4 16x – 56 = 3y – 18 16x – 3y = 38……………. (1) And 4x – 8 + y = 60 y = 68 – 4x…………………. (2) From equations (1) and (2), we get. 16x – 204 + 12x = 38 28x = 242 x = 8.6 Present age of C = 62 -(4 ×8.6) = 27.6years
How many layers are there in a data warehouse?
What is the primary advantage of using public key cryptography over symmetric key cryptography?
What is the primary purpose of data deduplication in storage management?
Which flow control technique allows the receiver to inform the sender about its buffer status?
A device that provides a central connection point for cable?
Which property is used to define the font of the element's text?
What is a deadlock in a computer system?
Kirchhoff's Current Law (KCL) is based on the principle of:
How does the ‘localStorage’ feature in HTML5 help web developers?
Which database operation is used to combine records from two or more tables based on related columns?
