Deepak has to cover a distance of 120km in 2 hours.he drives inthe beginning at 50km/hr for60km.at what speed should he drive for the rest of the journey,so that he reaches on time?(chaptername:direct and inverse variation)
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Hi Rowsan ,
total distance to be covered = 120 km
time to be taken = 2hrs
speed = distance/time
For 60 km
speed = 50km/h
time taken = d/s = 60/50 = 6/5hrs
so the remaining time and distance will decide the speed required
remaining distance = 120 - 60 = 60km
remaining time = 2 - 6/5 = 4/5 hrs
so required speed = d/t = 60 / (4/5) = 75km/h
hence he should drive at a speed of 75 km/h
Hope it helped.
Let me know if any doubts.
Cheers !!!
total distance to be covered = 120 km
time to be taken = 2hrs
speed = distance/time
For 60 km
speed = 50km/h
time taken = d/s = 60/50 = 6/5hrs
so the remaining time and distance will decide the speed required
remaining distance = 120 - 60 = 60km
remaining time = 2 - 6/5 = 4/5 hrs
so required speed = d/t = 60 / (4/5) = 75km/h
hence he should drive at a speed of 75 km/h
Hope it helped.
Let me know if any doubts.
Cheers !!!
rowsan:
which std you are studying
hey i saw ur next question, its speed value is missing?? pls check it n send again
50
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comment there ok
which standard are you studying
I will send you next question
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Pls send me corectanswer
hey i have answered your next question too.....pls check
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