By increasing the speed of his car by 15 km/hour a person covers 300 km distance by taking and 1 hour less than before the original speed of the car was?
Answers
Answered by
7
time=distance/speed
t-1=300/15
t=21 hr
s=300/21
=14.2 km/hr
t-1=300/15
t=21 hr
s=300/21
=14.2 km/hr
nirmalvalani041:
sorry its wrong
Answered by
3
Answer:
60kmph
Step-by-step explanation:
t=300/x
t-1=300/(x+15)
t=300/(x+15)+1
300/x-300/(x+15)=1
x^2+15x-4500=0
solving will give 2 answers.... 60 and -75. speed cant be negative so 60 is answer.
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