The surface area of a cuboid is 1300 cm .if it’s length is 15 cm and height is 20 cm find its breadth​

Question

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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Harper 1 week 2021-09-11T05:04:27+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-11T05:05:53+00:00

    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)

     \dfrac{\cancel{1300}}{\cancel2} = 35b + 300

    ⟹ 650 = 35b + 300

    ⟹ 650 – 300 = 35b

    ⟹ 350 = 35b

     \dfrac{\cancel{350}}{\cancel{35}} = b

    ⟹ 10 = b

    Hence,

    Breadth of a cuboid is 10cm.

    0
    2021-09-11T05:06:11+00:00

    Answer:

    15 x 20 = 300

    300 is the breadth of surface

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