Request a call back

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

ICSE Class 10 Answered

If the speed of the car is increased by 10km per hr,it takes 18 minutes less to cover a distance of 36 km.Find the speed of car
Asked by sukhmansohitsingh0565 | 19 Oct, 2019, 10:56: PM
Expert Answer
let space the space speed space be space straight x
distance space equals space 36 km
time space equals space 36 over straight x
on space increasing space speed space to space straight x space plus 10
straight t equals fraction numerator 36 over denominator straight x plus 10 end fraction
difference equals 18 over 30 space hrs
36 over straight x minus fraction numerator 36 over denominator straight x plus 10 end fraction equals 18 over 30 space
simplfying space we space get
straight x squared plus 10 straight x minus 1200 equals 0
straight x equals 30 space or space straight x equals negative 40
so space straight x space equals 30
speed space of space car space equals space 30 km divided by hr
Answered by Arun | 20 Oct, 2019, 01:55: PM
ICSE 10 - Maths
Asked by daviasha84033 | 05 Jan, 2023, 07:41: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by anuragjsg7 | 30 Dec, 2022, 11:00: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by harsha2007yash | 26 Dec, 2022, 07:40: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by jaiswalasha554 | 24 Dec, 2022, 01:18: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by KANRAR.SOUMEN | 15 Dec, 2022, 12:26: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by madhab_chaudhuri | 06 Dec, 2022, 01:38: PM
ANSWERED BY EXPERT
Get FREE Sample Mock Papers for Final Exams
Download Now
×