waktu 4 jam-210 menit+900 detik setara dengan...menit

4jam = 240 menit
900 detik = 15 menit

240-210+15= 45 menit

4 jam = 4 × 60 = 240 menit
900 dtk = 900 ÷ 60 = 15 menit
210 mnt = 210 menit

= 4 jam - 210 menit + 900 dtk
= 240 menit - 210 menit + 15 menit
= 45 menit