A Car Travels A Distance Of 2000 M. If The First Half Distance Is Covered At 40 Km/h And The Second Half With Speed V And The -average Speed Is 48 Km/h Then The Value Of V Is?

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Abhishek 4 Years Ago
248

A car travels a distance of 2000 m. If the first half distance is covered at 40 km/h and the second

half with speed v and the average speed is 48 km/h then the value of v is?

(1) 56 km/h (2) 60 km/h (3) 50 km/h (4) 48 km/h

asked Jun 15 12:00:00 AM

Abhishek

Q: 350 A: 0

1 Answers

  • 20

    Answer - (2) - 60km/h

    Explanation-

    V(average) = [d1 + d2]/[t1 + t2]

          48       = [d/2 + d/2]/[(d/2)/40 + (d/2)/V]

         48        = 2/[1/40 + 1/V]

         48        = 80V/40+V

         80V      = 48V+48(40)

         32V      = 1920

          V = 60km/h                 

    4 Years Ago

    asked Oct 16 12:00:00 AM

    Sangeeta

    Q: 22 A: 1924

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