1.

The ratio of the radii of two wheels is 2.:5 what is the ratio of their circumference

Answer»

Ratio of their circumference will be also 2:5

we can PROVE it :-

let radius of 1st CIRCLE be 2 CM

=> circumference = 2 × 22/7×2 =88/7 cm2

let 2nd circle radius be 5 cm

=> circumference = 2×22/7×5 = 220/7 cm

ratio of circumference = 88/7 ÷ 220/7
=88/7 × 7/220
=88/220
=2/5
=2:5



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