taylzaidi88
Answered

Westonci.ca offers fast, accurate answers to your questions. Join our community and get the insights you need now. Explore a wealth of knowledge from professionals across different disciplines on our comprehensive platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

solve this with explanation

Solve This With Explanation class=

Sagot :

(I) 140 sec (2) 300 sec or 5 min

Step-by-step explanation:

(1)80+60=140

(2)1 lap is 60 sec or 1min

we multiply with 60 sec × 5 = 300 sec or

1 min ×5 = 5 min

Answer:

(i) 240 s

(ii) 20 min

Step-by-step explanation:

(i) Just look at the times for X and Y after each round, when is the first time, that the times match? In seconds

X:  60, 120, 180, 240 ...

Y:  80, 160, 240, ....

So they meet at the starting point after 240 seconds.

X has done 3 laps and Y 4 laps at this time.

(ii)

To answer this question: Let x be the number of laps that Y has done.

If X has done 5 laps more the following must be true:

60 * (x + 5) = 80x

60x + 300 = 80x

300 = 20x

x = 15

Therefore Y has done 15 laps at the time, which results in:

80 * 15 = 1200 seconds - or 20 min.

At the same time

60 * 20 = 1200 seconds gives the same outcome

We hope our answers were helpful. Return anytime for more information and answers to any other questions you may have. Thanks for using our service. We're always here to provide accurate and up-to-date answers to all your queries. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.