A half of what john's age was 4 years ago is equal to one third of what it will be in 5 years' time. How old is john now?

answer: what equations are there

step-by-step explanation:

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

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answe: it will take 4.5 hours for naomi and clair to paint an equal number of square feet

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-lavira : )