An aeroplane travelled a distance of 400km at average speed of x km/hr. On the return journey, the speed was increased by 40 km/hr. Write down an expression for the time taken for: 1) the onward journey. 2) the return journey. 3)If the return journey took 30 minutes less than onward journey, write down an equation in X and find the value of X.
Attachments:
Answers
Answered by
1
Answer:
1) 400 / x hrs.
2) 400 / x + 40 hrs.
3) 400 / x - 400 / x + 40. = 1/2
therefore the value of X is 160.
Similar questions