30 should be the correct answer
Answer:
3x + 16 = 22.75
3 = 22.75 - 16
<u>3</u><u>×</u><u> </u>= <u>6</u><u>.</u>75
3 3
x= 2.25
Answer:
18.852:50.272
Step-by-step explanation:
Step one:
given
The radii of two right circular cylinders are in the ratio 3 : 4
r1= 3
r2= 4
Their heights are in the ratio 1 : 2
h1= 1
h2= 2
Step two:
The expression for the curve surface area is
CSA= 2πrh
CAS1= 2πr1h1
CAS1= 2*3.142*3*1
CAS1= 18.852
CAS2= 2πr2h2
CAS2= 2*3.142*4*2
CAS1= 50.272
The ratio of their curved surface areas
=18.852:50.272
x-2=7
apply additon property of equality
x-2+2=7+2
x=9
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