ICSE Class 9 Answered
the delhi metro train coverage a dstance of 42 km in 80 min. what is average speed of a train km/h as wel as in m/s
Asked by ayushnsehi16 | 18 Aug, 2018, 20:07: PM
speed = distance / time = ![begin mathsize 12px style fraction numerator 42 space k m over denominator 80 space m i n end fraction cross times fraction numerator 60 space m i n over denominator 1 space h o u r end fraction equals space 31.5 space fraction numerator k m over denominator h r end fraction end style](https://images.topperlearning.com/topper/tinymce/cache/265cdbd4609f4461a92abf59e29dbab8.png)
![begin mathsize 12px style fraction numerator 42 space k m over denominator 80 space m i n end fraction cross times fraction numerator 60 space m i n over denominator 1 space h o u r end fraction equals space 31.5 space fraction numerator k m over denominator h r end fraction end style](https://images.topperlearning.com/topper/tinymce/cache/265cdbd4609f4461a92abf59e29dbab8.png)
18 km/hr = 5m/s
hence speed in m/s = ![begin mathsize 12px style 31.5 space fraction numerator k m over denominator h r end fraction cross times space 5 over 18 fraction numerator begin display style bevelled m over s end style over denominator begin display style bevelled fraction numerator k m over denominator h r end fraction end style end fraction space equals space 8.75 space m over s end style](https://images.topperlearning.com/topper/tinymce/cache/4233a926d7e4915c91a9da6764df949d.png)
![begin mathsize 12px style 31.5 space fraction numerator k m over denominator h r end fraction cross times space 5 over 18 fraction numerator begin display style bevelled m over s end style over denominator begin display style bevelled fraction numerator k m over denominator h r end fraction end style end fraction space equals space 8.75 space m over s end style](https://images.topperlearning.com/topper/tinymce/cache/4233a926d7e4915c91a9da6764df949d.png)
Answered by Thiyagarajan K | 19 Aug, 2018, 11:42: AM
Application Videos
Concept Videos
ICSE 9 - Physics
Asked by pinaloswal1 | 13 Jul, 2024, 19:03: PM
ICSE 9 - Physics
Asked by 2016159 | 12 Jul, 2024, 16:20: PM
ICSE 9 - Physics
Asked by 2016159 | 26 Jun, 2024, 19:13: PM
ICSE 9 - Physics
Asked by 2016159 | 13 Jun, 2024, 23:23: PM
ICSE 9 - Physics
Asked by naitikv632009 | 03 Jun, 2024, 07:20: AM
ICSE 9 - Physics
Asked by 2016159 | 29 May, 2024, 19:50: PM
ICSE 9 - Physics
Asked by 2016159 | 29 May, 2024, 19:48: PM
ICSE 9 - Physics
Asked by modhukuruvenkateshwarlu | 13 Apr, 2024, 15:03: PM
ICSE 9 - Physics
Asked by thesangeeta1990 | 08 Mar, 2024, 16:37: PM