Question
‘B’ is 8 years elder to ‘A’ who is 20 years
younger to ‘C’. Eight years hence from now, age of ‘C’ will be 25% more than that of age of ‘A’. If average of present ages of ‘A’ and ‘D’ is 60 years, then find the ratio of ages of ‘B’ to ‘D’, 10 years ago from now.Solution
Let present age of ‘C’ is ‘x’ years. Present age of ‘A’ = ‘x – 20’ years Present age of ‘B’ = x – 20 + 8 = ‘x – 12’ years So, 1.25 × (x – 20 + 8) = x + 8 => 1.25 (x – 12) = x + 8 =>1.25x – 15 = x + 8 => 0.25x = 23 => x = 92 Present age of ‘B’ = 92 – 12 = 80 years Present age of ‘D’ = 60 × 2 – 72 = 48 years Desired ratio = (80 – 10):(48 – 10) = 70:38 = 35:19
A product is sold at ₹720 after two successive discounts of 10% and 20%. Calculate the marked price of the product.
What does the "Word Count" feature in a word processing software typically provide?
The ratio between the sum of the digits of a two-digit number and that two-digit number is 1 : 7. If the digit in the unit's place is four less than the...
A car starts from point A and travels at a speed of 40 miles per hour. After 1 hour, a second car starts from point A and travels in the same direction ...
If log₂(x) + log₄(x) + log₈(x) = 11, with x > 0, then the value of x is:
The ratio of the length and area of a rectangle is 1:39. And the ratio of length and breadth 4:3. Find the perimeter of the rectangle.
A doctor knows that 90% of patients have flu and 10% have allergy. Rash appears in 8% of flu patients and in 95% of allergic ones. If a patient shows r...
What is the total sales for Product B in all four quarters combined?
What will come in place of ?
4, 5, 13, 40, 104, ?.
The highest common factor (HCF) of two numbers is 17. If their product is 867, how many pairs of numbers satisfy these conditions...
