A cuboid is 18 cm long,15cm wide and 10cm high. Find its total surface area, lateral surface area and volume.
Answers
Step-by-step explanation:
Length =18cm
Breath = 15 cm
Height=10cm
Total surface area = 2(l×b+b×h+h×l)
=2 (18×15+15×10+10×18)
=2 (270+150+180)
= 2×600
= 1200 cm²
Lateral surface area = 2h (l+b)
= 2×10 (18+15)
= 20×33
= 660 cm²
Volume = l×b×h
= 18×15×10
= 2700cm³
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Class 9
>>Maths
>>Surface Areas and Volumes
>>Surface Area of Cubes and Cuboids
>>Find the volume, the lateral surface are
Question
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Find the volume, the lateral surface area and the total surface area of the cuboid whose dimensions are :
length =12cm, breadth =8cm and height =4.5cm
Medium
Solution
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It is given that length =12 cm, breadth 8 cm and height =4.5cm
We know that
Volume of cuboid =l×b×h
Volume of cuboid =12×8×4.5
Volume of cuboid =432 cm
3
We know that
Lateral surface of a cuboid =2(l+b)×h
Lateral surface area of a cuboid =2(12+8)×4.5
Lateral surface area of a cuboid =2×20×4.5
Lateral surface area of a cuboid =180cm
2
We know that
Total surface area of cuboid =(Ib+bh+Ih)
Total surface area of cuboid =2(12××8+8×4.5+12×4.5)
Total surface area of cuboid =2(96+36+54)
Total surface area of cuboid =2×186
Total surface area of cuboid =372 cm
2
Step-by-step explanation:
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