Question

the distance between two stations a and b is 160 km a train covers first 40 km at a speed of 20 km per hour how fast should the train travel while covering the remaining distance so that its average speed for the entire journey is 40 km per hour

Answer 1

DISTANCE BETWEEN TWO STATIONS A AND B = 160 KM
DISTANCE TRAVELED = 40 KM
TIME TAKEN FOR ABOVE = 2HRS

NOW AS WE HAVE TO MAKE AVG SPEED = 40 KM/H
THE
MAX TIME TO MAKE IT 40 KM/H = 160/40
= 4 H
NOW TIME LEFT = 2H
AND DISTANCE TO BE TRAVELLED = 120KM
THEN TO COVER 120 KM IN 2 HRS
SPEED = 120/2
= 60 KM/H

HOPE IT WAS HELPFUL

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Answer 2

= 160s2 = 80s2 - 4800

160s2 = 80s2 = 4800

80s2 = 4800

S2 = 4800/80

S2 = 60 km/ans

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