March Answer:

While shopping for a new tablecloth for her 90cm x 1.8 m rectangular table, Aleena was disappointed because she was not able to find a tablecloth she really liked. Luckily, Aleena did find several thin placemats that she liked. She decided to sew them together to create a tablecloth. Each placemat measured 30 cm x 45 cm. How many placemats should Aleena buy in order to cover her table completely and have at least 15 cm hanging off of each side of the table?

Solution:

Information known:

• table = 90cm x 180cm (1.8m)
• placemat = 30cm x 45cm

Area of Table: 18cmx90cm=16200

Area of Table Cover:

• (180cm +[15cm+15cm])x(90cm+[15cm+15cm])
• (180cm+30cm)x(90cm+30cm)
• 210cmx120cm=X

Equation:

Area of table (w/extra)

• A=LxW
• A=120X120
• A=25,200cm²

Area of Placemat

• A=LxW
• A=30x45
• A=1,350cm²

A=25,200/1350
A=18 ^2/3 or 19

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