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Start learning 50% faster. Sign in nowTotal books = 10 + 6 = 16 books Increment in average = 5 + 3 = 8 kg Now, Weight of 18 new books = (16 × 8) – (10 × 5) = 78 kg ∴ Required average = 78/6 = 13 kg
If the ratio between two numbers is 3: 5 and their LCM is 120, then the numbers are:
In a mixture 'P', the ratio of milk to water is 7:5. In another mixture 'Q', the ratio is 1:2. If 72 litres of P and 54 litres of Q are mixed, find the ...
In a garden, the ratio of roses to tulips is 2:3. After planting 6 additional roses and 4 additional tulips, the ratio of roses to tulips changes to 3:4...
The ratio of A's and B's salary is 6 : 7. If B's salary is increased by 5(1/2)%, then his total salary becomes Rs 1,26,600. The salary (in Rs) of A is:
Divide Rs 2,100 among P, Q and R, so that P shall receive 3/7 as much as Q and R together, and Q 2/3 of what P and R together receive. Find the share ...
A sum of money is divided between Neha and Anjali in a 7:9 ratio. If the total amount distributed had been increased by 15%, Neha’s share would have b...
Ratio of the number of pens with Sumit, Rohan, Chetan, Dheeraj and Gagan is 2 : 3 : 4 : 5 : 6 respectively. If two of them have more than 20% of the tot...
Radius of base of a hollow cone is 8 cm and its height is 15 cm. A sphere of largest radius is put inside the cone. What is the ratio of radius of base ...
Total population of city P and Q is 2720 and 3300 respectively. If the ratio of number of males to females in city is P and Q is 5:3 and 3:2 respectivel...