a swimmimng pool is 50 m long and 25 m wide. It is 1.2 m deep at the shallow end and 2 m deep at the other end find the area of the pool which is in contact with the water
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How to Make a Pinhole Camera
Cut a square hole. Cut a square hole into the middle of one of your pieces of card stock.
Tape foil over the hole. Tape a piece of aluminum foil over the hole.
Poke a hole in the foil. Use your pin or paper clip to poke a small hole in the aluminum foil.
Try it out. ...
Get creative.
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