converting

Question

mr.cho has a 10 year old so who is 54 inches tall. mr.cho wants to see if his sons above or below average. he has a tableof average heights for children. the table shows the avergae height for a boy at thgat age is 127.5 cm. how many cms taller is mr. cho"s son than the average? ( 1 cm equaks 2.5 in)

Answer 1

multiply 54 x 2.5 to get son's height

54 in x 2.5 cm/in = 135 cm

 

Son is 135 cm tall

 

Find the difference btwn average height and son's height

 135 cm - 127.5 cm = 7.5 cm

 

He is 7.5 cm taller than average