Subject:- Maths
Topic is Ratios and proportion
Please can you solve reason and don't write anything.
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Step-by-step explanation:
Heater uses 1 unit in : 40÷3= 13.33minutes
minutes in 2 hours = 60×2 = 120minutes
units used in 120 min. = 120÷13.33= 9 units approx.
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