RRB NTPC CBT-1 previous year questionThe sides of a rectangular field are 77 m and 98 m long. Its area is equal to the area of a circular field. What is the perimeter (in m) of the circular field? (Take ) 1256
The sides of a rectangular field are 77 m and 98 m long. Its area is equal to the area of a circular field. What is the perimeter (in m) of the circular field? (Take ) 1256 
Asked in RRB NTPC 2026 — 14 June Shift 3 · Quantitative Aptitude
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Correct answer: (B) 308
Area of rectangle = 77*98 = 7546 sq m equals the circle's area. With pi=22/7, r2=7546/(22/7)=2401, so r=49 m, giving circumference = 2*(22/7)*49 = 308 m.
हिंदी में प्रश्न
एक आयताकार मैदान की भुजाएं 77 m और 98 m लंबी हैं। इसका क्षेत्रफल एक वृत्तीय मैदान के क्षेत्रफल के बराबर है। वृत्तीय मैदान का परिमाप (m में) कितना है? 1256 = — मानिए) 
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 353
आयत का क्षेत्रफल = 77*98 = 7546 वर्ग मीटर वृत्त के क्षेत्रफल के बराबर है। pi=22/7 के साथ, r2=7546/(22/7)=2401, अतः r=49 मीटर, जिससे परिधि = 2*(22/7)*49 = 308 मीटर प्राप्त होती है।
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