{"status": "success", "data": {"description_md": "Roy bought a new battery-gasoline hybrid car. On a trip the car ran exclusively on its battery for the first $40$ miles, then ran exclusively on gasoline for the rest of the trip, using gasoline at a rate of $0.02$ gallons per mile. On the whole trip he averaged $55$ miles per gallon. How long was the trip in miles?\n\n$\\textbf{(A)}\\,140 \\qquad\\textbf{(B)}\\,240 \\qquad\\textbf{(C)}\\,440 \\qquad\\textbf{(D)}\\,640 \\qquad\\textbf{(E)}\\,840$", "description_html": "<p>Roy bought a new battery-gasoline hybrid car. On a trip the car ran exclusively on its battery for the first <span class=\"katex--inline\">40</span> miles, then ran exclusively on gasoline for the rest of the trip, using gasoline at a rate of <span class=\"katex--inline\">0.02</span> gallons per mile. On the whole trip he averaged <span class=\"katex--inline\">55</span> miles per gallon. How long was the trip in miles?</p>&#10;<p><span class=\"katex--inline\">\\textbf{(A)}\\,140 \\qquad\\textbf{(B)}\\,240 \\qquad\\textbf{(C)}\\,440 \\qquad\\textbf{(D)}\\,640 \\qquad\\textbf{(E)}\\,840</span></p>&#10;", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 3, "problem_name": "2011 AMC 10A Problem 15", "can_next": true, "can_prev": true, "nxt": "/problem/11_amc10A_p16", "prev": "/problem/11_amc10A_p14"}}