Answer:
its a bit blury
Step-by-step explanation:
do a close up
Answer:
300 bags of 20 kg of premixed are required.
Step-by-step explanation:
Given:
diameter of pond 'd'= 7 m (given)
radius of inner border of pond 'r'= d/2= 7/2 m
The radius of outer circular border 'R'= r+2= 7/2+2= 11/2m
Area of concrete border around the circular pond= area of outer circle- area of inner circle
So, 
=> 22/7 x ((11/2)²-(7/2)²)
=> 22/7 x (121/4-49/4)
=>
=> 56.57 m²
volume of concrete needed= area x height= 56.57 x 0.05= 2.8285 cubic meter
Since 1 cube meter requires 106 x 20 kg bags,
2.8285 cubic meters require bags= 2.8285x106x20 kg
20 kg bags of premixed concrete required= 2.8285x106x20/20
=> 2.8285x106
=> 299.821 or 300 approximately
Answer: 720ways, 24ways
Step-by-step explanation:
Given the seven letter words "SYSTEMS", if E is always occurring before M it means E and M will always be together therefore they letter 'EM' will be taken as an entity to five us 6letters i.e SYST(EM)S.
This can then be arranged in 6!ways
6! = 6×5×4×3×2×1 = 720ways
Similarly, if the E somewhere before the M and the three Ss grouped consecutively, this means E and M must always be together as well as the Ss to give (SSS)YT(EM).
This means that the letters in the bracket can be taken as an entity to give a total of 4 entities. This can them be arranged in 4! ways.
4! = 4×3×2×1
4! = 24ways
It is the areas of a road that can not be seen by the driver when looking forward or through the side mirrors or rear-view.
-Mabel <3
(If you don't mind, please give brainliest )
