Rectangle A has 7 times the area of rectangle
b. The width of rectangle A is half the width of rectangle
b. The height of rectangle A is 20mm. Wat is the height of rectangle
b.
Wa=0.5Wb, Ha=20, Hb is unkown the area of rectangle a is : Wa*20 the area of rectangle b is : Wb*Hb Rectangle a has 7 times the area of rectangle b: Wa*20=7*Wb*Hb Replace Wa with 0.5Wb: 0.5Wb*20=7Wb*Hb => Hb=10/7
