Answer:
30
Step-by-step explanation:
6x + 45 + 3x = 180
9x - 45 = 180
9x = 135
x = 15
Square Perimetre = Side x 4
So a length of a square ground is 160/4 = 40 (m)
Step-by-step explanation:
the area of a triangle is
baseline × height / 2
the baseline (where the height hits at a 90° angle) is 4 m.
the height is 3.7 m.
so, the area is
4 × 3.7 / 2 = 2 × 3.7 = 7.4 m²
