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Workbook

12. x is directly proportional toy, y is inversely proportional to z. If y=10, z=3 and x=6, find the value of x, if
z=4.

13. As a body falls from rest, its height varies directly as the square of the time in flight. If the height of a
body at the end of 2 seconds is 6 meters, what will be the height at the end of 3 second?

14. For a given load, the amount a wire stretches varies inversely as the square of the diameter. If a wire
with a diameter 0,6 cm is stretched 0,004 cm by a given load, how much will a wire of the same
material with a diameter 0,3 cm be straetched by the same load?

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