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If the length of a rectangle is increased by 2 meters, the area will increase by 10 square meters. If the width is increased by 3 meters, the area will increase by 18 square meters. How many square meters is the original area of the rectangle?
10/2=5
18/3=6
5*6=30
A rectangle with an area of 18 square centimeters, if its length and width are in whole centimeters, how many such rectangles can there be? What are its length and width
Formula or method
18=1X18=2X9=3X6
The length is 1,2,3, and the width is 18,9 and 6
Or change the length and width
There is a pile of sand piled into a cone, the bottom area is 18.84 square meters, 5 meters. With this pile of sand paved on the 10 meter wide road, paved 2cm thick, how many meters can be paved
One more question,
How can a 6.28-meter-long and 3.14-meter-wide reed mat be enclosed into a cylindrical grain bin to maximize its volume? What is the maximum volume in cubic meters?
cfh52f1,
Sand pile volume: 18.84 × 1.5 × 1 / 3 = 9.42 (M3)
Paving thickness: 2cm = 0.02M
Laying length: 9.42 ÷ (10 × 0.02) = 47.1 (m)
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