I have numeric dyslexia I hid it for years and struggled on and i did well in my job as an aircraft eng Theres loads of people out there without difficulties that cant be arsed getting out of bed
I whittled down to 55 = πab + πb^2 then remembered I was terrible as maths and gave up. Sorry, good luck!
Take the circumference of yer squished oval pipe and then get a round tube with the same circumference, round or oval the surface area should be the same