The cost of water is partly constant and partly varies as the number of units consumed. A family that use 10 units pays sh. 320...

The cost of water is partly constant and partly varies as the number of units consumed. A family that use 10 units pays sh. 320 and a family that uses 12 units uses sh. 370 for water. Calculate the amount paid by a family that uses 20 units of water in a month.

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Kavungya answered the question on September 30, 2019 at 08:03

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