Question #fc0ef
1 Answer
Mar 1, 2017
Explanation:
#"the rest of the mile "=1-3/7=4/7" mile"#
#"Using equivalent fractions in ratio form"#
#("10 mins")/(3/7" mile")=("x mins")/(4/7" mile")larr" x to be found"#
#color(blue)"cross-multiplying"#
#3/7x=10xx4/7#
#rArr3/7x=40/7# multiply both sides by 7
#cancel(7)^1xx(3x)/cancel(7)^1=cancel(7)^1xx40/cancel(7)^1#
#rArr3x=40# divide both sides by 3
#(cancel(3) x)/cancel(3)=40/3#
#rArrx=40/3=13 1/3#
#"Thus it will take "13 1/3" mins to walk rest of mile"#
