Question

Questions below

Answer 1

for a.

pi*1,5^2 *2 and pi*4,5^2 *6

the ratio = (pi*1,5^2 *2)/(pi*4,5^2 *6) = ?

Answer 2

after simplify by pi will get

1,5^2*2
--------- = ?
4,5^2 *6

Answer 3

2/6 = 1/3

Answer 4

1,5^2 1,5 1 1^2
------ =( ---- )^2 = ( --- )^2 = ---- = 1/9
4,5^2 4,5 3 3^2

but 1,5/4,5 = 1/3

Answer 5

but there is again 2/6 = 1/3
1 1
so ---- * ---- = 1/27
9 3

what mean that your result is sure correct

Answer 6

ok. ?

Answer 7

yep

Answer 8

how about B)?

Answer 9

you can calculi exactly same with a.