1,581.
A.
35cm3
B.
154cm3
C.
220cm3
D.
528cm3
E.
770cm3
Correct answer is E
Volume = \(\pi r^2 h\)
= \(\frac{22}{7} \times 7^2 \times 5\)
= \(770 cm^3\)
1,582.
A.
35cm2
B.
154cm2
C.
220cm2
D.
528cm2
E.
770cm2
Correct answer is D
TSA of a cylinder = \(2\pi r^2 + 2\pi rh\)
= \(2\pi r (r + h)\)
= \(2 \times \frac{22}{7} \times 7 (7 + 5)\)
= \(44 \times 12\)
= \(528 cm^2\)
1,583.
A.
75o
B.
60o
C.
45o
D.
30o
E.
0o
Correct answer is D
\(\theta_{1} = \theta_{2} = 30°\)
1,584.
calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
A.
86cm2
B.
154cm2
C.
616cm2
D.
1434cm2
E.
4312cm2
Correct answer is C
Surface area of a sphere = \(4\pi r^2\)
= \(4 \times \frac{22}{7} \times 7 \times 7\)
= \(616 cm^2\)
1,585.
A.
6o
B.
26o
C.
52o
D.
103o
E.
206o
Correct answer is D
πr2 = 360o
44cm2 = θ; ∴ θ =
44πr2
x 360o = 102.9o = 103oWAEC Subjects
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