How much weed killer does mr x need?

mr x wants to work out how much weed killer he needs for his flower beds.90cm height460cm length30ml of weed killer will cover 20m2 of land. he has 40

mr x wants to work out how much weed killer he needs for his flower beds.

90cm height
460cm length

30ml of weed killer will cover 20m2 of land. he has 40 flower beds of same size.

how much weed killer will he need to nearest 10ml

or:mr x wants to work out how much weed killer he needs for his flower beds.90cm height460cm length30ml of weed killer will cover 20m2 of land. he has 40 flower beds of same size. how much weed killer will he need to nearest 10ml

or:We do not want to mess up centimeters with meters. So, let's convert cm to m:90cm = 0.9m height (vertical garden? Well, if you like.)460cm = 4.6m lengthArea of one flower bed: 0.9m * 4.6m = 4.14m\u00b2There are 40 beds. Area of 40 beds:40 * 4.14m\u00b2 = 165.6m\u00b230ml of weed killer will cover 20m\u00b2 of land. We are to calculate to the nearest 10ml.30/3 = 10ml will then cover 20/3 = 6.67m\u00b2 land (rounded up from 6.666...)165.6 / 6.67 = 24.82 doses at 10ml each.That would be a total of 248.2ml.Rounded to the nearest 10ml dose this sums up to:250ml weed killer.

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