7. The ratio of the length and the breadth of a
rectangular plot is 8: 5. If the area of the plot is
640 sq cm, find its dimensions.
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Answer:
area of rectangular plot = l * b = 640 cm²
= 8x * 5x = 640
= 40x² = 640
= x² = 640 /40 = 16
= x = ✓ 16 = 4
length = 8 * 4 = 32
breadth = 5 * 4 = 20
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