Question
The present ages of A and B are in the ratio 8:5. The
ratio of A’s age 16 years from now to B’s age 4 years ago is 3:1. If C’s current age is 25% less than the sum of A’s and B’s present ages, find C’s present age.Solution
ATQ, Let present ages of A and B be 8x and 5x years. (8x + 16)/(5x - 4) = 3/1 ⇒ 8x + 16 = 15x - 12 ⇒ 7x = 28 ⇒ x = 4 Therefore, present age of C = 0.75 × (8x + 5x) = 0.75 × 52 = 39 years
Which PHP function is used for connecting to a MySQL database?
Which routing algorithm is commonly used in the network layer to calculate the shortest path between network nodes?
Which type of memory is faster to access and closer to the processor, providing temporary storage for frequently used data?
"Parity bits" are used for which of the following purposes?
What is the goal of instruction pipelining in a CPU?
Which of the following is a type of virus?
What does the "Projection" operation in relational algebra do?
Which of the following is a private IP address range?
What is a default route in routing?
Which of the following is not a network layer addressing scheme?