Question
In a park, the ratio of oak to pine trees is 7:4. If 21
oak trees and 12 pine trees are planted, the ratio of pine trees to oak trees becomes 3:5. Find the original number of pine trees.Solution
ATQ, Let the initial number of oak trees be 7x and pine trees 4x. After adding, oak trees = 7x+21, pine trees = 4x+12. New ratio (pine to oak): (4x+12/7x+21) = 3/5 Cross-multiplying = 
Original number of pine trees = 4x = 4×3 = 12.
Shivam invested 20000 at 12% p.a. simple interest for ‘x’ months. If at the end of ‘x’ months, he received a total amount of Rs.23600. What is t...
- In Microsoft PowerPoint, which view is the primary mode for creating and editing presentations?
Determine the mean of the following observations:
24, 26, 22, 25, 20, 21, 24, 25If a and b are whole numbers such that ab = 169, find the value of (a-3)(b+2).
Quantity I: ‘X’ – For a number greater than one, the difference between the number and its reciprocal is equal to 40% of t...
Ratio of monthly income to monthly expenditure of A is 8:7, respectively and monthly savings of A is Rs. 2880. Find the monthly income of A.
In Microsoft Excel, what does the function VLOOKUP do?
Determine the value of ‘x’ in the given expression.
(15 of 120 ÷ 6) ÷ 2 = x2 + 114In the given question, the given two series following the same pattern, then find the pattern used in the 1st series and use the pattern to find the unk...
Relevant for Exams:
