<span style="color: #222222;">Climbers from the United States and Hong Kong have set new records as they scaled Mount Everest this week.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Arthur Muir, 75, became the oldest American to climb the world's highest peak at 8,848.86-metres (29,031 feet), an official from the company that organised the expedition said.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Muir beat the record set by Bill Burke, who became the oldest American to climb the mountain at the age of 67 in 2009.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Separately, Hong Kong's Tsang Yin-Hung, 45, scaled the peak in less than 26 hours, the shortest time taken by any woman after starting from the base camp. </span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Usually climbers spend several days in different camps before reaching the peak. </span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Tsang set out from the base camp at 1.20 p.m. local time and reached the top at 3.10 p.m. the following day, said Gyanendra Shrestha, a Nepal Government official, who returned from the base camp.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">She beat the record set by Nepali woman Phunjo Jhangmu Lama in 2017, who climbed Everest in 39 hours and six minutes.</span><br />''  <br />