Answer:
<h2>
4.5 cm</h2>
Step-by-step explanation:
L = 2×π×r
9π cm = 2πr
9 cm = 2r
r = 4.5 cm
Answer:
Total 25.45 hours will be taken to empty the pool.
Step-by-step explanation:
Time taken by large pumpkin to empty the pool=40 hours
Time taken by the smaller pumpkins to empty the pool=70 hours
Amount of pool emptied by large pumpkin in one hour=![\frac{1}{40}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B40%7D)
Amount of pool emptied by small pumpkin in one hour=![\frac{1}{70}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B70%7D)
Amount of pool emptied in one hour if both pumpkins work together=
+ ![\frac{1}{70}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B70%7D)
=![\frac{11}{280}](https://tex.z-dn.net/?f=%5Cfrac%7B11%7D%7B280%7D)
Therefore, the no. of days will be the reciprocal of the amount of work done in one hour ie . ![\frac{280}{11}](https://tex.z-dn.net/?f=%5Cfrac%7B280%7D%7B11%7D)
Total 25.45 hours will be taken to empty the pool.
Answer:
The area will be increased by 72 feet.
Step-by-step explanation:
4 x 6 = 24
Now we have to double those lengths.
We know that 4 x 2 is 8 and 6 x 2 is 12.
So the new equation would be: 8 x 12 = 96
Now we take the original area and subtract it by the new area.
96 - 24 = 72
Hope this helps:)