Question

The base of a parallelogram is twice its height ,if its area is 800cm, find its height and base.

Answer 1

area = 800 cm(area of ||gm = bh)
bh = 800cm .....(1)
given base = 2 times height
i.e
height = x
base = 2x
from(1),
2x * x = 800
2x² = 800
x² = 800 ÷ 2 = 400
x = √400 = 20 cm
∴ height , h = 20 cm
base = 2×h = 2 × 20 = 40 cm

Answer 2

base = 2h
area= b*h
b also 2h *h
2h*h
2h²
2h² = 800
h² =800/2
h² = 400
h =√400
h = 20

b =2h
   = 2 * 20
   = 40