C i 1XL Learninq Inclus I httpswwwidcommathgrade4 volume Fo

> C i 1XL Learninq. Inclus; I https;/www.id.com/math/grade4 volume Fourth grade BB, 12 Volume What is the volume of this object? Questio answere 2 Time elapse 00 04 HR MIN SmartSc out of 100 19 cubic units Submit lype here to search

Solution

In the first case, we have a cuboid whose volume is l * b * h.

Length = 3 units, breadth = 4 units and height = 2 units. Therefore the volume = 3 * 4 * 2 = 24 cubic units.

In the 2nd question, the perimeters are the same, therefore for triangle 2, l + b = 12----(1)

Also given that the area l * b = 27, or l = 27/b. Substituting in Equation (1), we get

27/b + b = 12

= 27 + b² = 12b

= b² - 12b + 27 = 0, which is a quadratic equation whose roots are 3 and 9.

Therefore the dimension are 9mm by 3 mm