Saturday, 29 June 2013

What is the value of X in the following equation ? check your answer . 4x + 9 = 29

answer -  4x + 9 = 29
4x = 29 - 9
4x = 20
x = 20/4
x = 5
Checking the answer
LHS (Left Hand Side) = 4x + 9 = 4 x 5 + 9 = 29
RHS (Right Hand Side) = 29
LHS = RHS (LHS is not equal to RHS)


Thursday, 27 June 2013

Which tools are used for loosening of soil ?

answer - Tools used for loosening of soil
1) - Plough - A tool used since ancient times for loosening of soil , which works by attaching it to two cows.
2) - Hoe - A simple tools like plough for loosening of soil.
3) - Cultivator - A tool which is attached to tractor for loosening of soil and also for sowing seeds in the soil.

After 15 years rahul's age will be 4 times more his present age.What is his present age ?

answer - Let rahul's age be x
according to condition 
x + 15 = 4x
15 = 4x - x
15 = 3x
x = 15/3
x = 5
------> Rahul's present age is 5 years.

What are kharif and rabi crops ? when are they grown ? give some examples ?

answer - The crops which are grown in rainy season are called kharif crops . These are grown from June to                                
September. EG - cotton, rice.
The crops which are grown in winter season are called rabi crops . These are grown from october                                                
to March. EG - wheat, soyabean.