Find number abc
If cb8a8 + 41bc6 = aa6c4 find number abc. Multiple solutions may exist.Correct answers: 3
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Pneumatic tyreIn 1889, John Boyd Dunlop, a Scottish inventor, was issued a patent for his pnematic tyre. In 1887, when his 9-yr-old son complained of the rough ride he experienced on his tricycle over the cobbled streets of Belfast. Dunlop devised and fitted rubber air tubes held on to a wooden ring by tacking a linen covering fixed around the wheels. Due to the major improvement in riding comfort, Dunlop continued development, until he patented the idea. *[p.223] [Image: John Boyd Dunlop] |