Question

I had learnt all formulae of areas related to circles but i don't know how to put which formula in which question and how?

Answer 1

Area of a circle=πr²

For eg. If the r=2

If the value of π is not given, then it is usually taken as 22/7.

Therefore, π=22/7

πr²

22/7*2²

22/7*4

=88/7

=12.57

Therefore, the area of the circle=12.57

Answer 2

Hey your answer is in the given attachment

HOPE IT IS HELPFUL

⚘#thank you#⚘