Photosynthetically active radiation comes under which of the following special wavelength:
Photosynthetically active radiation is the spectrum of light used by plants for photosynthesis. It is in the range of 400-700 nm.
The ratio of the present ages of father and his son is 9:4. The product of their ages 3 years ago was 24 times of his son’s age that year. What was so...
A is 3 years older than B while C is 5 years younger than B. The ratio of age of A, 6 years hence and age of B, 3 years ago is 4:3. What was age of C, 1...
If R’s age is twice the average age of P, Q and R. P’s age is one third the average age of P, Q and R. If Q is 10 years old, the average age...
The average age of a father, mother, and daughter is 26 years. The average age of the mother and daughter is twice the age of the daughter. If the ages ...
The present age of Surjeet and Rakesh are in the ratio of 4:5. After 8 years the ratio of their ages will be 6:7. What is 70% of the sum of their presen...
A lad was asked his age by his friend. The lad said “The number you get when you subtract 25 times my age from twice the square of my age wi...
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 total age of A, B and C four years hence will be 88 years. Find the age of C five years hence, if the present age of A and B is 35 years and 25 year...
7 years ago, Meera’s age was equal to the Heena’s present age. The sum of Meera’s age 10 years from now and Heena’s age 5 years ago is 94 yea...
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
