SubArea: Angles, arcs and sectorsLevel: AProject ID: 2000004803Accepted: 0Clonable: 0Easy: 1In how many minutes does the hour clock-hand cover a right angle?\(180\,\mathrm{min}\)\(360\,\mathrm{min}\)\(60\,\mathrm{min}\)\(120\,\mathrm{min}\)
