If DEEP is coded as 30 and SEA is coded as 25, then how will RIVER be coded?

The coding logic is based on summing up the standard alphabetical positional values ($A=1,B=2,\dots ,Z=26$) of all individual letters:
* DEEP: $\text{D}(4)+\text{E}(5)+\text{E}(5)+\text{P}(16)=4+5+5+16=30$
* SEA: $\text{S}(19)+\text{E}(5)+\text{A}(1)=19+5+1=25$

Applying the exact same rule to RIVER:

$$\text{R}(18)+\text{I}(9)+\text{V}(22)+\text{E}(5)+\text{R}(18)=18+9+22+5+18=72$$