Question
The ratio of the husband’s age three years from now to
the wife’s age two years ago is 9:7. Additionally, the ratio of the husband’s age one year ago to the wife’s age ten years from now is 4:5. Determine the current age of the wife.Solution
Let the present ages of the husband and that of the wife be 'x' years and 'y' years, respectively According to the question, (x + 3):(y - 2) = 9:7 Or, 7x + 21 = 9y - 18 Or, 7x = 9y - 39 - [I] Also, (x - 1):(y + 10) = 4:5 Or, 5x - 5 = 4y + 40 Or, 5x = 4y + 45 - [II] Multiplying [II] by 1.4 7x = 5.6y + 63 So, 5.6y + 63 = 9y - 39 Or, 3.4y = 102 So, y = 102 ÷ 3.4 = 30
What is the term used for the study of soil in relation to higher plants?
Choose the best answer from the following options
Which of the following is a complex fertilizer?
Which type of soil water, characterized by occupying larger pores and moving readily under gravity, might contribute to reduced aeration in the soil if ...
What is the primary function of humus in soil?
How many seasons are there for seed certification in India?
The deficiency symptom for Fe in plants is
The study of soil from the stand point of higher plants is known as……………………….
Rock Phosphate is applied in which type of soil?
Heaviness and lightness of soil refers to
The acidic soils can be reclaimed by the application of ____