Question
The difference between the 7th and
2nd term of an Arithmetical Progression is 20 and its third term is ‘9’. Then find the total number of terms in the series if sum of series is 120.Solution
Given, a + 2d = 9 .................(i) (a+6d) – (a + d) = 20 5d = 20 d = 4 Put the value of ‘d’ in equation (i), we get a + 8 = 9 a = 1 Now, 120 = n/2 (2+(n-1)4) 120 = n/2 (4n-2) On solving, n = 8
By which of the following processes water enter into seed coat first when a dry seed is placed in a suitable medium for germination?
Where is the chemical weathering of rocks is most intense ?
A true fruit is developed:
What will be the base period of crop if duty of water is 1200 ha/cumec and depth of water is 50cm?Â
Deficiency of which essential plant nutrient leads to ‘pop pod in groundnut’:
Which of the following is a measure to promote agricultural exports under the Agricultural Export Policy?
What percentage of water-soluble K2O is present in Muriate Of Potash?
The Central Seed Testing Laboratory is located at:
Triple test cross is an extension of:
Which method is most suitable for the plantation of fruit trees in slopy areas?
Relevant for Exams:
