a car covers a certain distance in 10hours at the speed of 48km h . by how much should its speed is incresed so that it takes only 8hours to cover the same distance
Answers
Answered by
1
Answer:38.4km/h
Step-by-step explanation:
10 hours : 48km/h
8 hours : x
cross multiply =
10x=384
x=384/10
x=38.4
jaychawda:
no wrong thanks for your answer
Answered by
2
OK I WILL TRY
LET THE DISTANCE BE X
SO
DISTANCE /TIME =SPEED
X/10=48
X=480KM
OK
IN SECOND CONDITION
DISTANCE =X=480KM
IN TIME =8 HOURS
SO SPEED =DISTANCE/TIME
SPEED=480/8
SPEED=60KM/HR
SO SPEED INCREASED
=60-48=12KM/HR
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