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Mathematics

Grade-7

Easy

Question

Scale being used is 1 cm = 15 feet in the figure given below; determine the new scale factor if the length is increased to 80 cm.

0.455
1.724
1.574
1.875

The correct answer is: 1.875

Scale being used is 1 cm = 15 feet
10 cm= 10 × 15 = 150 feet
length is increased to 80 cm ( then what is the new scale factor )
$fraction numerator 150 blank f e e t over denominator 80 blank c m end fraction$ = $fraction numerator 150 blank divided by blank 80 over denominator 80 blank divided by blank 80 end fraction$ = $fraction numerator 1.875 blank f e e t over denominator 1 blank c m end fraction$

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