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Its length is 3 times as long as its breadth.
length → 3u breadth → 1u
total perimeter (units) → 3u x 2 + 1u x 2 = 8u
total perimeter (cm) → 48.8 cm
8u → 48.8cm 1u → 48.8 ÷ 8 = 6.1cm
length (3u) → 3 x 6.1 = 18.3cm
Question 1
Video explanation ↓The perimeter of a rectangular file is 48.8 cm. Its length is 3 times as long as its breadth. What is the length of the file? (2 marks)
Answer: 18.3 cm