a geologist found that silt was deposited on a river bed at the rate of 4cm every 170 years , how long would it take for 5 cm of silt how long would it to be deposited ???? plz helpp
4/170 = 5/x
Cross multiply and solve for x.
I got 850/x and 4 /x what do I do next to get the answer
When we cross multiply, we multiply the first and last terms together. Then we multiply the two middle terms together.
4/170 = 5/x
4x = 850
Divide both sides by 4
x = 212.5 years
It'll take 212.5 years for 5 cm of silt to be deposited.
thx u
You're welcome.
To calculate the time it would take for 5 cm of silt to be deposited on the river bed, we can use the given information: the rate of silt deposition is 4 cm every 170 years.
First, we need to determine how many 4 cm intervals are required to reach 5 cm. We can do this by dividing 5 cm by 4 cm:
5 cm ÷ 4 cm = 1.25
This tells us that we would need 1.25 intervals of 4 cm to reach 5 cm. However, since we cannot have a fraction of an interval, we need to round up to the nearest whole number. Thus, we need at least 2 intervals of 4 cm.
Now, we need to determine the time it would take for 2 intervals of 4 cm to be deposited. Since each interval requires 170 years, we can multiply this by 2 to get the total time:
2 intervals × 170 years = 340 years
Therefore, it would take approximately 340 years for 5 cm of silt to be deposited on the river bed.