{"status": "success", "data": {"description_md": "Keiko walks once around a track at exactly the same constant speed every day. The sides of the track are straight, and the ends are semicircles. The track has a width of $6$ meters, and it takes her $36$ seconds longer to walk around the outside edge of the track than around the inside edge. What is Keiko's speed in meters per second?\n\n$\\textbf{(A)}\\ \\frac{\\pi}{3} \\qquad\\textbf{(B)}\\ \\frac{2\\pi}{3} \\qquad\\textbf{(C)}\\ \\pi \\qquad\\textbf{(D)}\\ \\frac{4\\pi}{3} \\qquad\\textbf{(E)}\\ \\frac{5\\pi}{3}$", "description_html": "<p>Keiko walks once around a track at exactly the same constant speed every day. The sides of the track are straight, and the ends are semicircles. The track has a width of  <span class=\"katex--inline\">6</span>  meters, and it takes her  <span class=\"katex--inline\">36</span>  seconds longer to walk around the outside edge of the track than around the inside edge. What is Keiko&#8217;s speed in meters per second?</p>\n<p> <span class=\"katex--inline\">\\textbf{(A)}\\ \\frac{\\pi}{3} \\qquad\\textbf{(B)}\\ \\frac{2\\pi}{3} \\qquad\\textbf{(C)}\\ \\pi \\qquad\\textbf{(D)}\\ \\frac{4\\pi}{3} \\qquad\\textbf{(E)}\\ \\frac{5\\pi}{3}</span> </p>\n<hr><p>Full credit goes to <a href=\"https://maa.org/\">MAA</a> for authoring these problems. These problems were taken on the <a href=\"https://artofproblemsolving.com/\">AOPS</a> website.</p>", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 3, "problem_name": "2011 AMC 10B Problem 12", "can_next": true, "can_prev": true, "nxt": "/problem/11_amc10B_p13", "prev": "/problem/11_amc10B_p11"}}