Most official sources say that Spiderman can lift approximately 10 tons. His physical strength also extends to his leg muscles, allowing him to jump several stories high. Considering this, I've got three questions about Spiderman's physical strength:
A) Considering that Spiderman is able to lift 10 tons and his strength also extends to his leg muscles effectively making him at least hundred times stronger than most grown up men, shouldn't Spiderman be able to leap over skyscrapers rather than "only" several stories high? Why is his lifting strength not proportionate to how high he can jump? Is it just because the writers wanted him to be that physically strong but thought that it would be corny and ridiculous if his jumping abilities were similarly enhanced?
B) Why is Spiderman, and most other individuals with super strength in comics, not heavier than normal humans although their muscles are hundreds of times more effective? Doesn't stronger muscles also get heavier? Has comics ever made any attempt to explain this?
C) Does Peter Parker have to eat large quantities of food to maintain his extreme physique?
If you know the answer or has a theory to only one of these questions, please don't hesitate to share them! And please, do not reply: "Because it's comics", I am perfectly aware of that fact, thank you very much.