(i) 1 hour = 60 minutes, so 60 + 10 = 70 minutes. (ii) 2 hours = 120 minutes, so 120 + 45 = 165 minutes. (iii) 3 hours = 180 minutes, so 180 + 15 = 195 minutes. (iv) 4 hours = 240 minutes, so 240 + 20 = 260 minutes. (v) 75 ÷ 60 = 1 with remainder 15, so 75 minutes = 1 hour 15 minutes. (vi) 150 ÷ 60 = 2 with remainder 30, so 150 minutes = 2 hours 30 minutes. (vii) 220 ÷ 60 = 3 with remainder 40, so 220 minutes = 3 hours 40 minutes. (viii) 390 ÷ 60 = 6 with remainder 30, so 390 minutes = 6 hours 30 minutes.