Mining is the extraction of valuable minerals or other
geological materials from the Earth. A miner takes 1.5 hours
mine a gold ore while it takes him twice the time to mine a
diamond ore. Same miner digs out ruby in 30 mins less than
the time taken for diamond. How much time does it take th
miner to mine a rubu and a gold ore?
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Answer:
Ore is a deposit in Earth’s crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron.
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Answer:
4 hours
Explanation:
Gold = 1.5 hrs
diamond = 2*gold = 3hrs
ruby = diamond-30min = diamond-½hr = 2.5 hrs
Gold+ruby = 1.5+2.5 = 4hrs
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