Miccyy
15.07.2019 •
Mathematics
The circumference of a coin is 7.42 cm. what is the area? using 3.14 for π
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Ответ:
π = 3.14
circumference = 7.42 cm
or,. 2πr. =7.42
or,. 2×3.14×r. =7.42
or,. 6.28r. =7.42
or,. r. =7.42÷6.28
∆. r. =1.18 cm
Again,
Area of circumference= πr^2
=3.14 × 1.18^2
=3.14 × 1.39
=4.37 cm^2
Ответ:
360/x = 24/100
cross multiply
360·100 = 24x
36000 = 24 x
divide by 24
x= 1,500 kilometers