july00
13.05.2021 •
Mathematics
Assignment
The cross section of a prism is a right - angled
triangle 3cm by 4 cm by 5cm, the height of prism
is 8cm calculate the volume and total surface are
A rectangular tanka boem by som by 100 cm IS
half filled with water. How many liters of water is it
holding?
Solved
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Ответ:
B) 60.21 ft²
Step-by-step explanation:
Area of a triangle = 1/2bh
You can‘t used mixed measurements (feet and inches), so you have to convert each length to inches
8’6”=102’
14’2”=170’
Now find the area
1/2 x 102 x 170 = 8670 in²
This is one of the answers, but the quetion asks how many quart feet you need.
So, convert it back to feet.
8670 x 0.06944444444 = 60.2083333
(You could also have converted the two lengths to feet. 8’6” = 8.5 ft. 14’2” = 14.16666666. This way would probably have been faster.
1/2 x 8.5 x 14.166666 = 60.20833333)