The surface area of a cuboid is 1300 cm .if it's length is 15 cm and height is 20 cm find its breadth
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Answer:
15 x 20 = 300
300 is the breadth of surface
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Given :–
- Surface area of a Cuboid = 1300cm
- Length of a cuboid = 15cm
- Height of a cuboid = 20cm
To Find :–
- Breadth of a cuboid.
Solution :–
We know that,
Surface area of a cuboid = 2(lb + bh + hl)
⟹ 1300 = 2(lb + bh + hl)
- l = 15cm
- h = 20cm
- b = ?
Put the given values of l and h in the formula of surface area of a cuboid.
⟹ 1300 = 2[(15 × b) + (b × 20) + (20 × 15)]
⟹ 1300 = 2(15b + 20b + 300)
⟹ = 35b + 300
⟹ 650 = 35b + 300
⟹ 650 – 300 = 35b
⟹ 350 = 35b
⟹ = b
⟹ 10 = b
Hence,
Breadth of a cuboid is 10cm.
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