A coin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. What percentage of the metal in the co
2 answers:
Answer:
64% of the metal in the coin is copper.
Step-by-step explanation:
A coin contains nickel = 9 grams
and copper = 16 grams.
Total weight of the coin = 16 + 9 = 25 grams
Now we have to calculate the percentage of copper in the coin.
Therefore, × 100
= 0.64 × 100
= 64%
Hence 64% of the metal in the coin is copper.
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Answer:
He pays to the cab driver for 25 miles.
Step-by-step explanation:
Consider the provided information.
Let us consider he walks x miles at the rate of 4 miles per hour.
As we know
Therefore, time taken is:
He get a taxi for (31-x) miles at the rate of 50 miles per hour.
Therefore, time taken is:
It took 2 hours after he started.
That means the sum of time take is 2 hours.
Hence he walk 6 miles and he get a taxi for 31-6=25 miles.
He pays to the cab driver for 25 miles.