N/4 less than or equal to 5
45 is exactly half of 90
that means 45 is 50% of 90.
If x = the number you are trying to find:


and when dividing by a fraction you can flip it and multiply instead:
60 * 6/5 = 72
The number is 72
Answer: r=3v/2nh
Step-by-step explanation: