posted by Elizabeth .
A motorist makes a journey of 240 km from Singapore to Malacca to visit his inlaws at an average speed of x kilometers.
On his return journey, his average speed is reduced by 6km/hour due to traffic.
If the return journey takes 20 minutes longer, form an equation with x and solve it to find the average speed of each journey, giving your answer correct to two decimal places.
So: 240/x is the number of hours taken for the first journey.
240/x-6 is the time it takes for the return journey.
What do I do next? Please help!
and you know that the return journey takes 1/3 hour longer than the one going.
240/x + 1/3 = 240/(x-6)
x = 3(1+±481) = 68.80
240/62.80 = 3.82
240/68.80 = 3.49 = 3.82
difference: .33 hr = 20 min
you got the setup right, but didn't take that final step. Be sure to analyze everything they tell you, and the solution will emerge.
oops. typo that's
dhek bhai phely minutes ko convert kro phir jo answer aye us ko 240se add kr k equation se agey solve krlo
galat galat ammar galat