Question

When a water tank is 40% full, it contains 120 litres of water. How many litres of water
must be poured into it so that it will be 60% full?​

Answer 1

Step-by-step explanation:

An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it. The amount of charge on an object is proportional to its voltage.