The DNA of a nucleosome is 200 base pairs long when stretched out…

Step 1. (a) $200 \times 0.34\ \text{nm} = 68\ \text{nm}$.

Step 2. (b) $68\ \text{nm} \div 11\ \text{nm} = 6.2$. The DNA becomes about six times shorter.

Step 3. (c) $3.3 \times 10^7 \times 11\ \text{nm} = 3.63 \times 10^8\ \text{nm}$, which is $0.363\ \text{m}$.

Step 4. (d) No. A line of $0.363\ \text{m}$ is still about $60000$ times longer than a nucleus a few micrometres wide. The chromatin fibre and the chromosome fold it much further, with the help of the NHC proteins.