Radius= 1/2 • diameter
area of a circle = pie r^2 or (3.14 • radius^2 so u need the diameter this question needs more info
Answer:
4.9
Step-by-step explanation:
Tenths is the number directly after the "." so the 8 in 4.87 is the tenth. Rounding is quite easy, since 7 is bigger than 5 you add 1 to the 8 thus rounding the 4.87 to 4.9
It takes 107.692 minutes approximately to fill the pond
<em><u>Solution:</u></em>
Given that inlet pipe can fill an artificial pond in 70 min
So the inlet pipe can fill of the pond in 1 min
An outlet pipe can empty the same pond in 200 min
So the outlet pipe can empty of pond in 1 min
Here negative sign denotes "empties the pond"
To find: With both pipe open, time taken to fill the pond
Let "x" be the time taken by pipes to fill the pond
With both pipes are left on, so together their rate is:
On solving,
Thus it takes 107.692 minutes approximately to fill the pond
Answer: 6.4
Step-by-step explanation:
you take help of ratio in this case.
8/x = 2.5/2
or, (2.5).(x) = (8).(2)
or, x = 16/2.5
so, x = 6.4