Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 8 Answered

a train travels 360 km at a uniform speed. if the speed had been 5 km/hr more, it would have taken 1 hour less for the same journey. find the speed of the ratio ?

Asked by susanta.rkl | 31 Aug, 2018, 10:41: PM
Expert Answer
begin mathsize 16px style Let comma
the space speed space of space the space train space equals space straight x space km divided by hr
rightwards double arrow time space taken space to space cover space 360 space km equals space distance over speed space equals space 360 over straight x
According space to space the space condition comma

open parentheses straight x space plus space 5 close parentheses open parentheses 360 over straight x space minus space 1 close parentheses equals space 360 space space space space........ since comma space distance space equals space speed space cross times time
rightwards double arrow 360 space minus space straight x space plus space 1800 over straight x space minus space 5 space equals space 360
rightwards double arrow negative straight x squared space plus space 1800 space equals space 5 straight x
rightwards double arrow straight x squared space plus space 5 straight x space minus space 1800 space equals space 0
rightwards double arrow open parentheses straight x space plus space 45 close parentheses open parentheses straight x space minus space 40 close parentheses space equals space 0
rightwards double arrow straight x space equals space minus 45 space or space straight x space equals space 40
Speed space can apostrophe straight t space be space negative.
rightwards double arrow speed space of space the space train space is space 40 space km divided by hr.


end style
Answered by Yasmeen Khan | 03 Sep, 2018, 12:19: PM
CBSE 8 - Maths
Asked by utkarshsinghsolanki2009 | 10 Nov, 2022, 08:25: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by slnsuraj1006 | 22 Oct, 2022, 09:39: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by salmavora12.sv | 09 Oct, 2022, 10:40: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by rubinakha5053 | 14 Aug, 2022, 01:20: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by veeragrawal53.8 | 29 Jul, 2022, 10:03: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by avis28927 | 23 Jul, 2022, 06:17: AM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by S13066a.ankit017395 | 20 Jul, 2022, 08:07: PM
ANSWERED BY EXPERT
CBSE 8 - Maths
Asked by shashankgaradhya5 | 19 Jul, 2022, 08:50: PM
ANSWERED BY EXPERT
×