SSC CGL Tier II 21 Sep 2014 Paper

Question : 90 of 100

Marks: +1, -0

A car driver leaves Bangalore at 8.30 A.M. and expects to reach a place 300 km from Bangalore at 12.30 P.M. At 10.30 he finds that he has covered only 40% of the distance. By how much he has to increase the speed of the car in order to keep up his schedule?

45 km/hr
40 km/hr
35 km/hr
30 km/hr

Validate

Solution:

(4) Distance covered by car in 2 hours

= {300 × 40}/{100}=120 {km}

Remaining distance = 300 – 120 = 180 km
Remaining time = 4 – 2 = 2 hours
∴Required speed

=180/2

= 90 kmph
Original speed of car

=120/2

= 60 kmph
∴ Required increase in speed = 90 – 60 = 30 kmph

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