Monday 3 March 2014

Maths Work


2 comments:

  1. Pedro should buy his water from Channel Water company as that works out to be cheaper. Here is the explanation.

    Pedro’s bill if he uses Manana Water company:

    There is no standing charge to be paid, and no discount is given.

    He uses 700 m3 of water @€0.06 per m3
    So the total bill for 3 months = €0.06 x 700 = €42.00

    There are 4 quarters (1 quarter = 3 months) in a year.
    So his total bill for 1 year = €42.00 x 4
    = €168.00.

    Pedro’s bill if he uses Channel Water company:

    There is a standing charge of €30 every 3 months.

    He uses 700 m3 of water @€0.02 per m3 .
    So the cost of the water used for 3 months = €0.02 x 700 = €14.00.

    So the total bill for 3 months = €30 + €14.00 = €44.00

    But he gets 20% discount off the first bill = 20% of €44.00 = €8.80

    So the bill for the first quarter of the year = €44.00 - €8.80 = €35.20

    For the rest of the year there are no discounts, so he pays €44.00 for the remaining 3 quarters.

    So his total bill for 1 year = (€44.00 × 3) + €35.20
    = €167.20

    ReplyDelete