BC = 48m, CD = 17m, AD = 40m and perimeter = 120 m
Perimeter of trapezium ABCD = AB + BC + CD + DA
⇒ 120 = AB + 48 + 17 + 40
⇒ 120 = AB + 105
⇒ AB = 120 - 105 = 15m
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Area of a trapezium is
12×(a+b)×h Now Area of the field =
12×(BC+AD)×AB =
12×(48+40)×15=12×88×15 =
660m2 Hence are of the field ABCD is =
660m2