Hamster cage

Ryan keeps his hamster cage on his dresser. The area of the top of Ryan's dresser is 1 2\3 as large as the area of the bottom of his hamster cage. The area of the dresser top is 960 square inches. How many square inches of his dresser top are not covered by the hamster cage?

Result

x =  640 sq inch

Solution:

S1=960 S2=(1+2/3)⋅ S1=(1+2/3)⋅ 960=1600 x=S2−S1=1600−960=640 sqinchS_{1}=960 \ \\ S_{2}=(1+2/3) \cdot \ S_{1}=(1+2/3) \cdot \ 960=1600 \ \\ x=S_{2} - S_{1}=1600 - 960=640 \ \text{sq} \text{inch}

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