Q1) An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1(2/3) hours, it must travel at a speed of; A)300kmph
B)360kmph
C)600kmph
D)720kmph

Explain how you got the answer

D) 720 kmph

Explanation:

First, let's find what distance this aeroplane covered. Distance (d) is the product of speed and time - here, we have a speed of 240 kmph and a time of 5 hours, gives us

km

Using that same fact, we can set up a new equation to solve for speed (s) when we have a distance of 1200 km and a time of 1 2/3 hours. For the sake of cleanliness, I'm gonna rewrite 1 2/3 as the improper fraction 5/3:

Multiplying both sides of the equation by 3/5:

kmph

So our answer is D.

the answer is a 3.8cm

explanation:

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge