Question
The number of trees in a park increases by 12% every
year. If the number of trees after 2 years will be 3,136, find the current number of trees in the park.Solution
ATQ,
Let, the present number of trees be ‘x’.
ATQ,
So, the number of trees after 2 years = 1.12 × 1.12 × x = 3136
Or, x = 3136 × (1/1.12) × (1/1.12)
So, x = 2,500
Therefore, the current number of trees in the park = x = 2,500
A shopkeeper acquires 24 pens at Rs. 900 each and 12 geometry boxes at Rs. 300 each. Later, he sells 2 pens to each of the 12 students, presenting them ...
A student has to secure 40% marks to pass an examination. He gets 150 marks and fails by 30 marks. What are the maximum marks?
'P' allocates 25% of his income to rent and then spends 40% of the remaining amount on food and travel. After these expenses, he spends Rs. 5600 on misc...
A man invested all his current month income in starting of a new business in which he spends 40% in advertisement 25% of remaining in furniture 20% of r...
- Three figures are given such that the first is 45% less than the third, and the second is 50% less than the third. The first figure is what percent of the ...
Monthly income of Eric and Olivia is Rs. 71,200 and Rs. 78,500 respectively. Eric spends 9%, 16%, and 18% on house rent, food, and education of children...
Income of 'P' is 60% more than that of 'Q'. 'P' and 'Q' save 35% and 25% of their respective incomes. If the difference in their expenditures is Rs. 1,0...
In a given years, A sold 800 caps while B sold 60% more number of caps than A and C sold 25% less number of caps than B. Find the ratio between the numb...
Income of Riya is Rs. (124n + 1680). She spends 75% of her income and saves the rest. Savings of her friend Mehul is Rs. 960 more than that of her. Mehu...
A candidate just passed by getting 30 answers correct by attempting 60 of the total questions. Find the total number of questions in the examination if ...
Relevant for Exams:
