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# Maths watch

1. when servicing a heating boiler and radiators, a plumber knows the time he will take is give by the formula

Time = 1 hour + 45 mins per radiator

He charges his customers a call out fee of £30.00 , plus £20.00 per hour.

How much should a customer be charges for servicing a heating boiler and four radiators ? Show your working out
2. (Original post by lara36)
when servicing a heating boiler and radiators, a plumber knows the time he will take is give by the formula

Time = 1 hour + 45 mins per radiator

He charges his customers a call out fee of £30.00 , plus £20.00 per hour.

How much should a customer be charges for servicing a heating boiler and four radiators ? Show your working out
3. (Original post by Y11_Maths)
£30.00
1 hour 45 mins x 4 = 7 hours
7 x £20 = £140.00
30.00 + 140.00 = 170.00
4. (Original post by lara36)
£30.00
1 hour 45 mins x 4 = 7 hours
7 x £20 = £140.00
30.00 140.00 = 170.00
Your method is good but I think you are misreading the information, time taken will be 1 hour for the boiler plus 4 X 45 minutes for radiators.
5. (Original post by gdunne42)
Think you are misreading the information, time taken will be 1 hour for the boiler plus 4 X 45 minutes

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