Qstnid -B-1- Find The Length And Perimeter Of A Rectangle, Whose Area = 120 Cm2 And Breadth = 8 Cm - 20: Area Of Trapezium And A Polygon Class 8 Maths - Icse-viii-mathematics

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ICSE-VIII-Mathematics

20: Area of Trapezium and a Polygon Class 8 Maths

with Solutions - page 2

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#1
Find the length and perimeter of a rectangle, whose area = 120 cm2 and breadth = 8 cm
Ans : area of rectangle = 120 cm²
breadth, b = 8 cm
Area = l × b⇒ l × 8 = 120
⇒ l = 120/8 = 15 cm
Perimeter = 2 (l + b) = 2(15 + 8) = 2× 23 = 46 cm
Length = 15 cm; Perimeter = 46 cm