The ratio of the present ages of father and his son is 7:4. The product of their ages 4 years ago was 31 times of his son’s age that year. What was son’s age 3 year ago?
Let present age of father and son be 7x and 4x respectively. According to question, => (7x – 4) (4x – 4) = 31 × (4x – 4) => (7x – 4) = 31 => 7x = 35 => x = 5 Therefore, son’s age 3 years ago = (4x – 3) = 17 years
Which of the following is not matched correctly?
What is the primary difference between Theoretical Field Capacity and Effective Field Capacity?
A plan according to which crops grown on individual plots of a farm during a given period of time to maximise return and enhance soil fertility is:
The term vernalization was given by ______in 1928.
Adoption index suitable for Laggards is
The first confirmed occurrence of herbicide resistant strain of a weed species in US was associated with
Which among the following harrow type is operated by several rotating discs on a common shaft
Periwinkle is cultivated as
NADP-Me type C4 pathway is found in
Seeds of many cultivated species belonging to __________ group