Penjelasan dengan langkah-langkah:

14.

Rumus =

● JP = JS × S

● JS = JP : S

● S = JP : JS

Cara :

Diketahui =

• JP = 8 cm

• S = 1 : 5.000.000

Ditanya = JS ?

Jawab = JP : S

= JP : S

= 8 : ( 1 : 5.000.0000 )

= 8 × 5.000.000

= 40.000.0000 m ( 400 km 》 1 km = 100.000 m )

16. 1,5 ha + 1.200 m² - 10 dam²

Jawab = 1 ha = 1 hm² = 10.000 m²

= 15.000 m² + 1.200 m² - 1.000 m²

= 16.200 m² - 1.000 m²

= 15.200 m²

26. Luas Permukaan balok = 2 × ( ( p.l ) + ( p.t ) + ( l.t ) )

Diketahui =

• P = 11 cm

• L = 5 cm

• t = 8 cm

Jawab =

2 × ( ( 11 × 5 ) + ( 11 × 8 ) + ( 5 × 8 ) )

2 × ( 55 + 88 + 40 )

2 × ( 143 + 40 )

2 × ( 183 )

366 cm²