The length of a rectangle is twice its breadth. What is the length, if the perimeter is 90cm ? *
30cm
15cm
10cm
Answers
Answered by
0
Answer:
let breadth x
length 2x
2X3x=90
6x=90
x=90/6
15
Answered by
2
Answer:
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2 ( l + b) cm = 90 sq.cm 2 ( 2b + b)cm = 90 sq.cm 2 ( 3b) cm = 90 sq.cm 6b cm = 90 sq.cm b cm = 90 / 6 sq.cm b = 15 cm as length = 2 b length = 2 x 15 cm = 30 cm so the length is 30 cm and breadth is 15 cm