Question
If the length of a rectangle is increased by 10% and its
breadth is decreased by 5%, then the area of the rectangle will be increased or decreased by how much percent?Solution
According to the question Percentage change in Area = x – y – xy/100 = 10 – 5 – 10 × 5/100 = 5 – 0.5 = 4.5% The area of the rectangle will be increased by 4.5%.
An 84-litre mixture contains 75% milk. If 'x' litres of water are added to this mixture, the quantity of milk in the resulting mixture becomes 27 litres...
- The ratio of milk and water in a mixture is 4:3 respectively. When 8 litres of milk and 10 litres of water are added to the mixture, the ratio becomes 6:5 ...
Quantity of milk is 10% more than that of water in 210 litres mixture. On adding (n - 5) litres water and (n + 5) litres milk, the new ratio becomes 11:...
In a 448 ml mixture, the ratio of copper to gold is 9:5. When 'a + 12' ml of copper and 'a - 10' ml of gold are added to this mixture, the ratio of copp...
- A solution has milk and water in the proportion 3:2. After removing 20 ml of this solution and adding 10 ml milk, the ratio becomes 4:1. Find the total vol...
- Two mixtures (milk and water) 'A' and 'B' contain milk and water in the ratio 2:3 and 1:2 respectively. If 30 ml from 'A' and 36 ml from 'B' are mixed, fin...
- A milk seller has a 50-litre mixture of milk and water, where water makes up 40% of the total volume. He wants to adjust the mixture so that the amounts of...
A container contains Alcohol and water in ratio of 7:3 and Capacity of Container is 80 lit. If half of the Container is replaced with 13 lit of water th...
Fresh watermelon contains 60% water. Dry watermelon contains 30% water. From 1 Quintals fresh Watermelon, approximately how many kgs of Dry Watermelon c...
In a mixture of juice & water, 60 litres water is mixed due to which ratio changes from 3:4 to 1:2. Find initial quantity of mixture. (in lit...
Relevant for Exams:
