Question

Beth’s brother is 140% of Beth’s height. If Beth’s brother measures 140cm, how tall is Beth?

Answer 1

100 cm

Explanation:

let x be the height of Beth

and y be the height of Beth's Brother

By 1st Condition

y = 140% * x

y = (140/100) * x

y = 1.4 x ..........................(Eq 1)

By 2nd Condition

y = 140

Put the value of y in the equation 1

140 = 1.4 *x

x = 140 / 1.4

x = 100 cm