Question

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

Answer 1

4/170 = 5/x

Cross multiply and solve for x.

Answer 2

I got 850/x and 4 /x what do I do next to get the answer

Answer 3

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.

Answer 4

thx u

Answer 5

You're welcome.