Volume and Surface Area Questions Practice Question and Answer

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Answer : 3. "$$ {40-R_1^{2}}\over R_1$$"

Q:

त्रिभुज का क्षेत्रफल ज्ञात कीजिए जिसकी मध्यिकाएँ  क्रमशः 8 सेमी, 15 सेमी और 17 सेमी है ?

855 0

  • 1
    $$20 cm^2$$
    Correct
    Wrong
  • 2
    $$15 cm^2$$
    Correct
    Wrong
  • 3
    $$24 cm^2$$
    Correct
    Wrong
  • 4
    $$28 cm^2$$
    Correct
    Wrong
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Answer : 1. "$$20 cm^2$$"

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Answer : 4. "27"

Q:

एक वर्ग का विकर्ण 14 सेमी है। तो उस वर्ग के विकर्ण की लंबाई क्या होगी जिसका क्षेत्रफल पहले वर्ग के क्षेत्रफल से दोगुना है?

691 0

  • 1
    $$ {28\sqrt{2}{\ cm}}$$
    Correct
    Wrong
  • 2
    $$ {14\sqrt{2}{\ cm}}$$
    Correct
    Wrong
  • 3
    28
    Correct
    Wrong
  • 4
    $$ {21\sqrt{2}{\ cm}}$$
    Correct
    Wrong
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Answer : 2. "$$ {14\sqrt{2}{\ cm}}$$"

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Answer : 1. "7 सेमी"

Q:

यदि दो समरूप त्रिभुजों ABC और DEF के क्षेत्रफलों का अनुपात 36: 81 हो, और EF = 6.9 सेमी. है, तो BC बराबर है- 

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  • 1
    4.6 cm.
    Correct
    Wrong
  • 2
    6.4 cm.
    Correct
    Wrong
  • 3
    4 cm.
    Correct
    Wrong
  • 4
    6 cm.
    Correct
    Wrong
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Answer : 1. "4.6 cm. "

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Answer : 2. "$$ {36 {\ cm^{2}}}$$"

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