Question #1c942

1 Answer
Jan 6, 2018

#~~0.649" cm to 3 dec. places"#

Explanation:

#"using "color(blue)"Pythagoras' theorem"# on the triangle on the right side

#BM=sqrt(6^2+2^2)=sqrt40=2sqrt10#

#rArrAM=2sqrt10#

#"length of string is now "2sqrt10+2sqrt10=4sqrt10#

#"extension "=4sqrt10-12~~0.649" cm to 3 dec. places"#