Question

If � p and � q vary inversely and � p is 18 when � q is 28, determine � q when � p is equal to 72.

Answer 1

• q = 7

Explanation:

p and q vary inversely:

• p = k/q

If p = 18, q = 28, find k:

• 18 = k/9
• k = 18*28 = 504

The equation is:

• p = 504/q

When p = 72, q is:

• 18 = 504/q
• q = 504/72
• q = 7