Question
A girl’s age is 160% of what it was 5 years ago, but
80% of what it will be after 6 years. What is her present age?Solution
Let the girl's present age be 'x' years. According to question, => 1.6 × (x-5) = 0.8 × (x+6) => 1.6x – 8 = 0.8x + 4.8 => 0.8x = 12.8 => x = 16 years
The total number of students in a school is 24600. If the ratio of boys to the girls in the school is 75:89 respectively, then find the total number of ...
- The mean proportional of 8 and 50 is _____.
What number has to be added to each term of 2:5 to make the ratio 7:8?
A bag contains certain number of coins of different denominations. The ratio of the number of Rs. 2 coins to Rs. 5 coins is 3 : 4, respectively and the...
A sum of money is divided among P, Q, R and S in the ratio of 3:4:8:9 respectively. If the share of R's is Rs. 2900 more than the share of Q, then what ...
What is the fourth proportional to 10¹⁵, 2⁶ and 5⁶?
If 30% of a certain number is equal to 4/5th of another number, what is the ratio between the numbers?
The ratio between the number of books and pencils is 8:5 and the ratio of cost of per book and pencil is 6:5 then find the percentage by which total cos...
P, Q and R together started a business. Six times the investment of P equals eight times the investment of Q and the capital of Q is twice that of R. Fi...
Two numbers are respectively 40% and 70% more than a third number. Find the ratio of two numbers.