SSC GD Constable 4 Feb 2025 Shift 2 Paper

Section: Elementary Mathematics

Question : 51 of 80

Marks: +1, -0

Rachin travels a distance at 60 km/hr for 2 hours and 80 km at 40 km/hr. Find the average speed of Rachin (in km/hr).

Solution:

Average speed

=

Total distance

\/

Total time
Calculation:
Distance of

1^{\;\text "st "\;}

part

=60 × 2=120 km

Time for

2^{\;\text "nd "\;}

part

=80 ÷ 40=2 hr

Total distance

=120+80=200 km

Total time

=2+2=4 hr

⇒ Average speed

=200 ÷ 4=50 km \/ h

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