When servicing a heating boiler and radiators, a plumber knows that the time
he will take is g...
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Mathematics, 31.03.2020 16:24 davgre1271
When servicing a heating boiler and radiators, a plumber knows that the time
he will take is given by the formula
Time = 1 hour + 45 minutes per radiator
He charges his customers a call-out fee of £30. plus £20 per hour.
How much should a customer be charged for servicing a heating boiler and
four radiators?
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Answers: 3
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