The diameters of two circles are in the ratio 2 5 The area of the larger circle is 450 cm?
Work out the area of the smaller circle
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72 cm²

Step-by-step explanation:

Given the ratio of diameters = a : b , then

ratio of areas = a² : b²

Here the ratio of diameters = 2 : 5 , then

ratio of areas = 2² : 5² = 4 : 25

let x be the area of smaller circle then using proportion

= ( cross- multiply )

25x = 1800 ( divide by 25 )

x = 72

That is the area of the smaller circle is 72 cm²

mark brainliest

step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones