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A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semi-circle in one sweep)
  • a)
    481.25 sq. inch
  • b)
    461.5 sq. inch
  • c)
    475.75 sq. inch
  • d)
    none of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A car wiper can clean 693 sq. inch area in its one sweep. If its leng...
Let original length a car wiper be L inch.
Area cleaned by the car wiper in 1 sweep
= (1/2) x (22/7) x (L)2L2 = 693 x (7/11) = 63 x 7
L = 21 inch.
Area cleaned by car wiper in a sweep if its length decreased by 3.5 inch.
= (1/2) x (22/7) x (17.5) x (17.5)
= 481.25 sq. inch.
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A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semi-circle in one sweep)a)481.25 sq. inchb)461.5 sq. inchc)475.75 sq. inchd)none of theseCorrect answer is option 'A'. Can you explain this answer?
Question Description
A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semi-circle in one sweep)a)481.25 sq. inchb)461.5 sq. inchc)475.75 sq. inchd)none of theseCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semi-circle in one sweep)a)481.25 sq. inchb)461.5 sq. inchc)475.75 sq. inchd)none of theseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semi-circle in one sweep)a)481.25 sq. inchb)461.5 sq. inchc)475.75 sq. inchd)none of theseCorrect answer is option 'A'. Can you explain this answer?.
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