Three children each eat 2/3 of a cake how much cake is eaten altogether?

John bought 2 horses at rs 20000 each

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Hello, i need compare km^2 and km. what's difference in this?