Tolong bantu saya ya pliss aku kasih big poin ​

Jawab:

(1)

1/3 × π × r² × t

(atau)

1/3 × π × r² × √(s²-r²)

– – – – – – – – – – – – – – – – – – – – – –

(2) 4.026 cm²

– – – – – – – – – – – – – – – – – – – – – –

(3) 12.501 cm³

– – – – – – – – – – – – – – – – – – – – – –

Penjelasan:

π = 22/7 atau 3,14

r = jari-jari (diameter/2)

t = tinggi

s = sisi miring

– – – – – – – – – – – – – – – – – – – – – –

(1) Rumus volume kerucut =

1/3 × π × r² × t

Atau

1/3 × π × r² × √(s²-r²)

– – – – – – – – – – – – – – – – – – – – – –

r = 42 cm/2. r = 21 cm

s = 40 cm

(2) Luas permukaan =

(π×r)×(r+s)

= ((22/7)×21)×(21+40)

= 66 × 61

= 4.026 cm²

– – – – – – – – – – – – – – – – – – – – – –

r = 35/2 = 17,5 cm

t = 39 cm

Volume?

(3) Rumus volume kerucut =

1/3 × π × r² × t

= 1/3 × 3,14 × 17,5² × 39

= 12.501,125 cm³

Atau dibulatkan menjadi 12.501 cm³

– – – – – – – – – – – – – – – – – – – – – –

#StayPositive – kexcvi