Logo
    Logo

    Subject

    Bank Exam

    Topic

    Southeast Bank Ltd. - Probationary Officer - 2017

    If a square mirror has a 20-inch diagonal, What is the approximate perimeter of the mirror, in inches ?

    ক)
    47
    খ)
    51
    গ)
    57
    ঘ)
    60

    Explanation

    Solution: প্রশ্নে বলা হচ্ছে যে, বর্গাকৃতির একটি আয়নার একটি কর্ণের দৈর্ঘ্য 20 ইঞ্চি । আয়নাটির সম্ভাব্য পরিসীমা কত ? আমরা জানি, বর্গের কর্ণ = 2 ×\sqrt 2  \times বাহুর দৈর্ঘ্য এবং পরিসীমা = 4 × \times বাহুর দৈর্ঘ্য এখন, বাহুর দৈর্ঘ্য = a হলে প্রশ্নমতে, 2\sqrt 2 a = 20      a = 202\frac{{20}}{{\sqrt 2 }} আয়নাটির সম্ভাব্য পরিসীমা = 4a=4×202=2×2×202=2×2 ×2 ×202=402 =56.57≈574a = 4 \times \frac{{20}}{{\sqrt 2 }} = 2 \times 2 \times \frac{{20}}{{\sqrt 2 }} = 2 \times \sqrt 2  \times \sqrt 2  \times \frac{{20}}{{\sqrt 2 }} = 40\sqrt 2  = 56.57 \approx 57

    Related questions

    The most appropriate title of the passage is:If 4a+ 4a+1= 4a+2- 176, what is the value of a ?According to the passage, people are involved in terrorism because of:If 1,500 is increased by 20% and then reduced by y%, yielding 1,080, what is the value of y ?The theme of the passage is:Lamia is 12 years old. She is three times older than Farzin. What will be the age of Lamia when she is two times older than Farzin ?According to the passage:If a train runs at 40 kmph, it reaches its destination late by 11 minutes but if it runs at 50 kmph, it is late by 5 minutes only. The correct time for the train to complete its journey is:

    Find Tutors

    View all Tutors