tolong bantu mengerjakan soal no.3-5 beserta caranya

3. v ÷ w = d
2400 ÷ 30 = 80 liter per menit

4. 380 ÷ 80 = 4.5 = 4 jam 30 menit
11.30 + 04.30 = 16.00

5. 50 km = 5000000 cm
5000000 ÷ 20 = 25000