Volume of a Rectangular Prism: V=lwh
l=50 cm
w= 30cm
h= 40 cm
Step 1: 50×30×40= 60,000
The volume of the tank is 60,000 cubic centimeters
The water reaches a height of 28 centimeters, or 2142.9 cubic centimeters per centimeter.
Step 2: 35× 2142.9= 75001.5 cubic centimeters
Step 3) 75001.5- 60,000= 15001.5 CUBIC CENTIMETERS ARE NEEDED TO FILL THE REST OF THE TANK TO A HEIGHT OF 35 CENTIMETERS
Hope this helps!