Nanga parbat=8100m. Himadri=6000m. Mount everest=9000m. Nanda devi=7500m. Kanchenjunga=8000m. Find the ratio of the height of the lowest and highest peaks and write down the measurement of the heights of the peaks in the ascending order

• Nanga Parbat: $8100 \text{ m}$
• Himadri: $6000 \text{ m}$
• Mount Everest: $9000 \text{ m}$
• Nanda Devi: $7500 \text{ m}$
• Kanchenjunga: $8000 \text{ m}$

The lowest height is $6000 \text{ m}$ (Himadri).
The highest height is $9000 \text{ m}$ (Mount Everest).

The ratio is $\boxed{2:3}$.

The heights in ascending order are:
$6000 \text{ m}$ (Himadri), $7500 \text{ m}$ (Nanda Devi), $8000 \text{ m}$ (Kanchenjunga), $8100 \text{ m}$ (Nanga Parbat), $9000 \text{ m}$ (Mount Everest).