
pls help. thank you
pls help. thank you
total distance ——- 7u
2u ——- 18 x 5 = 90
1u ——- 90/2 = 45
7u ——- 7 x 45 = 315
John’s speed ——- 315/5 = 63
David’s speed ——- 63 – 18 = 45
90/45 = 2
Ans : 2h.
hi Alfretztay, thanks.
Hi ATM 82517, welcome .
I thought the question is strange. David travelled 5/7 of distance in 5 hours so he would need another 2 hours to travel remaining 2/7 of distance (by proportion).
The question may have a 2nd part asking for something tougher like to calculate speed. You may want to check again.
hi sahmom, thanks