The last option would be I think
S=d/t
30/0.75=40
Answer: 40km/h
Borax, also known as sodium borate, sodium tetraborate,
or disodium tetraborate, is an important boron compound,
a mineral, and a salt of boric acid. Powdered borax is white,
consisting of soft colorless crystals that dissolve easily in water.
Its molecular (chemical) formula is <span>
<span>Na₂B₄O₇·10H₂O or Na₂[B₄O₅(OH)₄]·8H₂O .</span></span>
No work is done because the object needs to be moved. The formula for work is Work = Force x Distance.