what time does a crop take to mature?

A is twice as good a workman as B. A takes 6 days to comlete a task. What time does B take to complete the work (in days)?

How much time does the train take to reach Ahmedabad after departing from Anand Jm. (including the halt time) ?

How much time does light take to reach us from the sun ?

What is a GM crop ?

What are rabi crops ?

What does legume crop provide to the soil?

State what does 'standing crop' of a trophic level represent.