Question
An effective method to prevent nematode infestation when
it is not yet present in the area?Solution
 Crop rotation is one of the oldest and most economical methods of controlling nematodes. Rotation is simply the practice of not growing a susceptible host in the same site for more than one year.
Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 30 years. If their ages are in the arithmetic progression in the same order a...
At present Neeta is thrice Sita’s age. Eight years hence the respective ratio between Neeta and Sita’s age will be 5:2. What is Neeta’s age after ...
The present ages of A and B are in the ratio 5 : 3. After 4 years, the ratio of their ages becomes 3 : 2. What will be A's age after 6 years?
15 years ago, the average age of all the 40 teachers of the college was 50 years. 8 years ago, the principal has retired from her post at the age of 60 ...
The current ages of individuals 'A', 'B', and 'C' are in the proportion 7:2:3. Eight years prior, the average age of the three was 28 years. Determine t...
 Present average age of A, B and C together is 44 years. Age of B is 12 Years hence from now will be 260% more than age of A. Four years ago from now ...
Five years from now, the age of Arjun will be 28 years. Six years from now, the ratio of ages of Arjun and Varun will be 4:5 respectively. After how man...
Present age of ‘A’ is 25% more than that of ‘B’. If 22 years hence from now, ‘B’ will be 20 years younger than ‘A’, then find the sum of...
A’s age is 180% of what he was 5 years ago, But 90% of what it will be after 5 years. What is his present age?
Three years ago, the ratio of ages of ‘Ravi’ and his sister was 3:4. Three years from now, the ratio of ages of Ravi and his mother will be 2:5. In ...
