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Dig a 6 m long, 5 m wide and 2 m deep rectangular pool, which covers an area of ① 30 square meters ② 10 square meters ③ 12 square meters
area covered
=Length × width
=6×5
=30 square meters
Option 1
Dig a pool 4 meters long and 1.5 meters wide. The pool covers an area of () square meters（
16
Dig a cylindrical pool with a depth of 5 m and a bottom diameter of 2 m on the ground. What is the floor area of the pool? How many square meters is the area of cement plastered around the bottom of the pool? How many liters of water can the pool hold?
There is also a question like this before, please adopt it in time!
Radius = 1m
Height = 5m
Floor area = 3.14 × 1 & # 178; = 3.14 square meters
Plastering area
=Bottom area + side area
=3.14×1²+2×3.14×1×5
=34.54 square meters
It can hold water
=3.14×1²×5
=15.7 M3
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A trapezoid (cube), 25 meters long, 4 meters long, 7 meters high, 50 meters wide, volume
Hurry!
V trapezoid = s trapezoid × height
=(25+4)×7÷2×50
=5075 M3
How many faces does a trapezoidal cube have
1 cube on the left and 2 cubes on the right (up)
8
It needs to be considered from top to bottom, left to right, front to back
Two on the left and two on the top. The rest is one
The bottom of a right angled trapezoid is five times that of the top. The top is extended by 16 cm and becomes a cube. What is the area of the original trapezoid?
If the upper bottom is x, the lower bottom is 5x
Then there is height = lower bottom = upper bottom + 16
X+16=5X
4X=16
X=4
5X=20
therefore
S trapezoid = 1 / 2 * (4 + 20) * 20 = 240 square centimeter
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