Answer: 5
Step-by-step explanation:
From the question, we are informed that "x varies inversely with v". This means that
x = k/v
where,
k is a constant
We have to find k when x=35 when v=3
x = k/v
35 = k/3
k = 35 × 3
k = 105
Therefore when v = 21, x will be:
x = k/v
x = 105/21
x = 5
