Question

. यदि एक रेलगाड़ी किसी निश्चित दूरी को 30 कि.मी./घंटे
से और लौटते वक्त 50 कि.मी./घंटे से तय करती है तो
उसकी औसत चाल ज्ञात कीजिये?
(a)33 कि.मी./घं
(b) 37.5 मी./से.
(c) 37.5 कि.मी./घं
(d) 39 कि.मी./घं​

Answer 1

Step-by-step explanation:

answer is 40

as we dont know the distance so we assume it equal distance travel ..

Answer 2

I thi think the answer is b

so i solve it

distance= x km

time in first situation = x/30 h

time in second situation = x/50 h

average speed of train = x+x/x÷30+x÷50

=2x/4x÷75

=150/4

=37.5 km/h