Question

The cost of a mirror is directly proportional to
the square of its width. A Mirror of with 40cm cost 24$
Work out the cost of a mirror of width 60cm​

Answer 1

Answer:

The cost of circular mirrors is directly proportional to the square of the diameter. A circular Mirror with a diameter of 60cm costs £50. What is the cost of a circular mirror with a diameter of 90cm?

2)M and G are positive quantities. M is inversely proportional to G. When M= 90, G= 40 Find the value of M when G = M.

3) y is inversely proportional to the square of x. When y = 3, x = 2 Find the value of y when x = 4

4) y is directly proportional to the square of x. When y = 5, x = 4. Find the value of y when x = 8.