Question

guys are you sure this formula is correct as shown in picture to find tsa of a hollow cylinder. Plz frame a question and ans also i want where you have to apply this new formula and old formula of TSA hollow cylinder plz i need to verify so plz so kindly frame a question where we have to find TSA OF A HOLLOW CYLINDER WHEN DIAMTER IS GIVEN AND in ans part plz use NEW FORMULA AND OLD FORMULA AND CHECK WHETHER ANS IS CORRECT or NOT IN BOTH CASES. So KINDLY SOLVE IN A SHEET OF PAPER GUYS FAST I HAVE Exam plz understand ​

Answer 1

Answer:

See example now, and than mark all my answers as brainlist ❤️.

Find total surface area of a steel pipe whose interior and exterior diameters measure 15cm and 17cm respectively, and length 10m....