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Soal-Soal Bangun Ruang Sisi Lengkung

1. Diketahui sebuah tabung memiliki jari-jari 3,5 cm dan tinggi 8 cm. Berapakah

luas selimut tabung tersebut?

a. 190 cm c. 1!" cm

b. 180 cm d. 1"" cm

#a$aban% &

'enjelasan% ( rt

( )!

) 3,5 ) 8

( 1!" cm

. 'ada s*al n*.1 luas permukaan tabung adalah+

a. 53 cm c. 3 cmb. 3 cm d. 3 cm

#a$aban%

'enjelasan% ( rr / t

( )!

) 3,5 ) 3,5 /8

( ) 11,5 ( 53 cm

3.uas selimut tabung adalah 31 cm. pabila jari-jari tabung 5 cm dan ( 3,1,

hitunglah luas tabung tersebut2

a. 51 cm c. 1 cm

b. !1 cm d. 5 cm

#a$aban % B

'enjelasan % uas selimut tabung ( 31 cm

r ( 5 cm ( 3,1

uas selimut tabung ( rt31 ( ) 3,1 ) 5 ) t

t (51,3

31

xx( 10 cm

uas tabung ( rr / t ( ) 3,1 ) 5 ) 5 / 10 ( !1 cm

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. entukan 4*lume tabung ang jari-jari alasna 10 cm dan tinggina 5 cm

a. !08 cm3 c. !850 cm3

b. !!80 cm3 d. !819 cm3

#a$aban % &

'enjelasan % 6.abung ( rt

( 3,1 ) 10) 5 ( !850 cm3

5. entukan 4*lume tabung ang berdiameter 1 cm dan tinggi 0 cm

a. 13.131 cm3 c. 13.8"0 cm3

b. 11.131 cm3d. 13.8!0 cm3

#a$aban % &

'enjelasan% 6.abung (,

1dt

(,

1)

!

) 1 ) 0

( 13.8"0 cm3

". 7itunglah luas permukaan kerucut dengan jari-jari alas kerucut ! cm dan panjang

garis pelukis 1 cm (!

a. 1 cm c. !81 cm

b. 18 cm d. 51! cm

#a$aban % B

'enjelasan % ( rs / r

(!

) ! ) 1 / !

( 18 cm

!. Diketahui jari-jari alas sebuah kerucut 8 cm. pabila kerucut itu mempunai4*lume "0 cm3, hitunglah tinggi kerucut itu dan panjang garis pelukisna 2

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a. 31,5 cm dan 31,05 cmc. 30 cm dan 31,55 cmb. 5,!5 cm dan 30 cm d. 30 cm dan 31,05 cm

#a$aban% D

'enjelasan % 6*lume kerucut (

3

1 rt

"0 (3

1 .8.t

t (88

3",0

x

x

( 30 cm

s ( t / r

( 30/ 8

( 900 / " ( 9"

s ( 9",

s ( 31,05 cm

#adi tinggi kerucut adalah 30 cm dan panjang garis pelukisna adalah 31,05 cm.

8. ebuah tutup makanan ang berbentuk belahan b*la dengan jari-jari 0,3 m dibuat

dari jaring-jaring plastik tipis. Berapa banak bahan plastik ang harus disediakanuntuk membuat sebuah tutup makanan?

Berikan ja$aban dalam bentuk .

a. 0,13 c. 0,88 b.

0,!5 d. 0,18

#a$aban% D

'enjelasan% uas jaring-jaring plastik (

1 ) r

(

1) ) ) 0,3( 0,18

9. 7itunglah luas permukaan b*la ang berdiameter 1 cm 2

a. 1 cm c. "1" cm

b. 1 cm d. !1" cm

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#a$aban % &

'embahasan% uas permukaan b*la ( d

(!

) 1 ) 1

( ) 8 ( "1" cm

10. ebuah mangk*k berbentuk belahan b*la. angk*k tersebut berisi 8"cm3s*p

ang memenuhi mangk*k. Berapa diameter mangk*k tersebut ?

a. 18 cm c. 19 cmb. 1" cm d. 1! cm

#a$aban %

'enjelasan% 6*lume mangk*k ( 8"

1)

3

, r3( 8"

r3 ( 8" )1

)

,

3)

1

r3 ( !9

r ( 3 !9 ( 9

#adi diameter mangk*k tersebut ( 9 ) ( 18 cm

:akhmadani 7utama

3 '

PEMBAHASAN KISI-KISI ULANGAN HARIAN BANGUN RUANG SISILENGKUNGSoal bisa kalian Download padasitus www.masawanwinanto.wordpress.com pada kategorimatematika kelas 9.

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