If the mantle has a density of 3000 kg/m3 and a section of crust ...

[AEWBW]

If the mantle has a density of 3000 kg/m3 and a section of crust has a density of 2000 kg/m3, what percent of the crust would stick up above the top of the mantle and what percent would stick down into the mantle?
 
  What will be an ideal response?

Question 2

Why are the highest mountains 200 to 400 kilometers inland of oceanic-continental convergent plate boundaries rather than right at the boundary?
 
  What will be an ideal response?

[kjo;oj]

Answer to Question 1

2000 km/m3 divided by 3000 km/m3 results in 2/3rds, which means that 2/3rds (66.6) of the crust would be below water, while 1/3 (33.3) of the block would be above water.

Answer to Question 2

The highest mountains and thickest crust form over the overriding plate in the region marked by intrusion of plutons and compressive thickening and plastic flow. This region is 200 to 400 km inland of the trench, which marks the plate boundary.

[AEWBW]

Thanks for the timely response, appreciate it

[xiazhe]

Excellent