manbabymanhook
27.01.2021 •
Mathematics
The dimensions of a picture are 5” width by 7” height. A photographer wants to enlarge it to an 8” width by 10” height. What is the ratio of the width of the picture to the width of the enlargement?
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Ответ:
Step-by-step explanation:
let the radius of circle = r
let the diameter of circle= 2r
circumference for original radius = π × diameter
=2πr
if diameter double , then diameter becomes = 2(2r) = 4r
now circumference of circle = π(4r) = 4πr
i.e. circumference also double