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Find number abc

If 473c4 + a49a4 = bb23b8 find number abc. Multiple solutions may exist.

Correct answers: 11

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The magazine about c...

“The magazine about ceiling fans went out of business due to low circulation.”

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Submarine

In 1851, the submarine, Le Plongeur-Marin ("The Marine Diver") was tested in Kiel Harbour, but it suffered leaks in the hull and sank 50 feet. Its builder, Sebastian Wilhelm Valentin Bauer, a German pioneer inventor of submarines, was on board. He survived by waiting for the inside air pressure, compressed as more water leaked in, to match the water pressure outside. Seven hours later, he and his crew opened the hatch and rose to the surface to find funeral services in progress. He was not deterred by the accident, and went on to build a treadmill-powered, 52-ft iron submarine, Le Diable-Marin (“The Marine Devil”) carrying 11 crew. The photographs Bauer made through its windows are probably the first taken underwater.«

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