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Pregunta 81

Which statements correctly describe inverse-proportion changes? Select all that apply.

  1. Six identical independent looms take 10 hours for an order, so three take 5 hours.
  2. Ten identical independent painters finish one wall in 6 hours, so twelve take 5 hours.Respuesta correcta
  3. A fixed 96 kilometre route takes 3 hours at 32 kilometres per hour, so it takes 2 hours at 48 kilometres per hour.Respuesta correcta
  4. Eight identical independent scanners take 9 minutes for a batch, so twelve take 13.5 minutes.

Explicación

For the fixed wall, 10 painters taking 6 hours means 60 painter-hours, so 12 painters take 5 hours; covering the fixed 96 kilometres at 48 kilometres per hour takes 2 hours. The loom claim is the closest trap because halving the number of identical looms doubles the time rather than halving it.

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Pregunta 81: Which statements correctly describe inverse-proportion… · Ratios and Proportions · Questena