Perimeter of a rectangle is 42 cm. Find the dimensions of length is 5 cm longer then 3 time of width.
Answers
Answered by
2
Perimeter = 2(l+b)
42 cm = 2(3x+5 +x) let the width be x
42 = 6x + 10 + 2x
42 = 8x + 10
42 - 10 = 8x
32 = 8x
4 =x
length - 3x+5 = 17cm
width - x = 4cm
Answered by
2
Answer:
breadth = x = 4cm
length = 3(4cm) + 5cm
= 12cm + 5 cm
= 17cm
Step-by-step explanation:
breadth = x
length = 3x + 5cm
perimeter of rectangles
= 2(l+b) = 42cm
=) 2 (3x+5cm+x) = 42cm
=) 2( 4x + 5cm) = 42cm
=) 8x + 10cm = 42cm
=) 8x = 42 -10
=) 8x = 32
=) x = 32/8
=) x = 4
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