Junior Class 5 Answered
the perimeter of a classroom is 42m.if the length of the classroom is 12m, find the breath of the classroom hence find the area of the classroom.
Asked by raju.ramoji | 05 Apr, 2020, 02:03: PM
Expert Answer
Let l and b be the length and breadth of the classroom.
Perimeter of classroom = perimeter of rectangle = 2(l+b)
42 = 2(12 + b)
42 = 24 + 2b
2b = 18
b = 9 m
Area of classroom = ara of rectangle = length x breadth = 12 x 9 = 108 m2
Answered by Renu Varma | 05 Apr, 2020, 02:27: PM
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