Question
A mixture of milk and water contains 25% water. On
adding 20 litres of water, the quantity of milk becomes 40% more than that of water. Find the initial quantity of water in the mixture.Solution
ATQ, Let the total quantity of mixture initially be '100y' litres. Quantity of water = 0.25 × 100y = '25y' litres. Quantity of milk = 100y - 25y = '75y' litres. ATQ: 75y=1.4×(25y+20) 75y=35y+28 40y=28 y = 28/40 = 0.7 Therefore, initial quantity of water = 25 × 0.7 = 17.5 litres.
Choose the number which is different from the group.
 How many numbers up to 800 are divisible by both 3 and 5?
15Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 60Â Â Â Â Â Â Â Â Â Â 540Â Â Â Â Â Â Â Â 8650
...If 893x2 is divisible by 56, and x > 6, find x.
A two-digit number is such that the sum of its digits is 10. If 36 is added to the number, the digits interchange their places. Find the number.
- When a number is divided by 60, the remainder is 17. What will be the remainder when the same number is divided by 10?
- Consider a number of the form '49678a' which is divisible by 6 but not divisible by 5. Find the value of (a × 2 + 3).
- What quantity must be subtracted from (11/16) to get (3/8)?
A fraction becomes 1/6 when 4 is subtracted from its numerator and 1 is added to its denominator. If 2 and 1 are respectively added to its numerator and...
Relevant for Exams:
