# 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"#