Start at 100 and use intervals of 20 to go up in the number line
like this
100------120--140--160--180--200--220---240--260-
and then input the values 137 and 245 on the number line like this
100--120--137-140--160--180--200--220--240-247--260
Answer:
20 π unit ^3 is your answer mate. . .
25.1. The Area of a circle is 2πr, so 2π(4) is the formula.
I don't understand the question, but I did get this:

Hope this helps!!