An aeroplane flies along the four sides of a square at the speeds of 100, 200, 300 and 400 km/hr. Find the… · ABC26GN3579
Subject: General Aptitude · Chapter: Time and Distance · Exam: P.C.S. 2009
An aeroplane flies along the four sides of a square at the speeds of 100, 200, 300 and 400 km/hr. Find the average speed of the plane around the field.
Answer
No answer key was printed for this question.
Explanation
Let each side of the square be x km and let the average speed of the plane around the field be y km/hr. x x x x 4x 25 x 4 x 1200 × 4 Then, + + + = ⇔ = ⇔ y = = 192. 100 200 300 400 y 1200 y 25 \ Average speed = 192 km/hr.
Explanation as extracted from the printed page; notation may be imperfect.