i think this is the incomplete page that you are showing but the answer is
:-
<h2><u>
B</u></h2>
P = IV
I = P/V = 30 / 120 = 0.25 A.
Current = 0.25A
1.Density of the material building the raft must be lower than the water.
<span>2. Material must not react with water. </span>
<span>3.Material must have high strength. </span>
<span>4.Raft must be wide in-order to avoid drawing in the river.</span>
