Answer:
r=2
Step-by-step explanation:
Divide diameter by 2 since the diameter is half of radius
4/2=r
r=2
The given expression is

49 is the square of 7 and 64 is the square of 8.
So we can write the given expression as


The answer is 860 liters. You round down to 860 because it’s closer than 870.
I am solving the equation in simplest way
Line:-1



Line:-2


