Question

17.
Abhimanyu covers 360 km distance from Delhi to
Ludhiyana in three equal parts by Train, by Car and
by Cycle. Average speed of Journey by train is five
times the average speed of Cycle and 20 km/h more
than the average speed of Car and he takes 1 hour
more to cover the distance by Car than Train. Find
average speed of Journey.
अभिमन्यु 360 किमी की दूरी दिल्ली से लुधियाना तीन बराबर
भागों में ट्रेन, कार और साइकिल द्वारा तय करता है। ट्रेन की
औसत गति साइकिल से 5 गुना और कार से 20 किमी/घंटा
ज्यादा है और वह कार द्वारा दूरी तय करने में ट्रेन की
तुलना
में
1 घंटा ज्यादा लेता है। यात्रा की औसत गति क्या है?
(a) 22 km/h
(b) 24 km/h
(c) 25km/h
(d) 28 km/h
solve in detail plz​

Answer 1

Answer:

We can first set the speed of the train that started from Delhi is x km/hour

the speed of the train that started from Lucknow is x +15

the first train covered 8x km in 8 hours

the second train covers 8(x+15) in 8 hours

total distance covered = 8x+ 8x+120 = 620

16x = 500

X = 31.25 km

speed of train that starts from Lucknow = 31.25+15= 46.25 km/ hour

4.1