Fifteen days is equivalent to 1,296,000 seconds, or one million two hundred ninety-six thousand seconds.
1. to solve this problem, you must apply the formula for calculate the surface area of a cylinder, which is: a=2πr²+2πrh a is the surface area of the cylinder. r is the radius of the cylinder. h is the height of the cylinder. 2. let's call the smaller ganza "a" and the other one "b". 3. the surface area of the ganza "a" (aa) is: aa=2πr²+2πrh r=diameter/2 r=3.5 cm/2 r=1.75 cm h=10 cm 4. when you substitute these values into the formula, you obtain: aa=2πr²+2πrh aa=2π(1.75 cm)²+2π(1.75 cm)(10 cm) aa=41.125π cm² aa=129.0 cm² 5. the surface area of "b (aa) is: ab=2πr²+2πrh r=5.5 cm/2 r=2.75 cm h=24.5 cm 6. when you substitute these values into the formula, you obtain: ab=2πr²+2πrh ab=2π(2.75 cm)²+2π(2.75 cm)(24.5 cm) ab=149.875π cm² ab=471.0 cm²