What is the volume of this

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If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?