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5. The length of a cuboid having breadth =4cm height= 4cm and total surface area = 148 cm2, is |
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Answer» :›»› The length of the cuboid will be 7.25 cm.Given :Breadth of a cuboid = 4 cmHeight of a cuboid = 4 cmTotal surface area of cuboid = 148 cm².To Find :Length of a cuboid = ?Solution :Let us assume that the length of a cuboid is L cm.As we know that→ TSA of cuboid = 2(lb + bh + lh)→ 148 = 2(l * 4 + 4 * 4 + l * 4)→ 148 = 2(4l + 4 * 4 + l * 4)→ 148 = 2(4l + 16 * l * 4)→ 148 = 2(4l + 16 * 4l)→ 148 = 2(8l + 16)→ 148 = 2 * 8l + 2 * 16→ 148 = 16l + 32→ 148 - 32 = 16l→ 116 = 16l→ l = 116 ÷ 16→ l = 7.25║Hence, the length of the cuboid will be 7.25 cm.║Extra Brainly Knowledge :➝ Volume of cuboid = l * b * h.➝ CSA of cuboid = 2(l + b)h.➝ TSA of cuboid = 2(lb + bh + lh).➝ CSA of cube = 4a².➝ TSA of cube = 6a².➝ Volume of cube = a³.➝ Volume of cylinder = πr²h.➝ TSA of cylinder = 2πrh + 2πr².Where,l is the length.b is the breadth.h is the height.a is the SIDE or edges.The value of π is 22/7 or 3.14.r is the RADIUS. |
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