Question

a train covers 140km in 3.5 hours how much time would it take to cover 120 km at the same time​

Answer 1

cross multiplying

140 - 3.5

120 - ?

(120*3.5)÷ 140

= 3 hours

Answer 2

if it covers 120 km in 1 hour, it means that it covers 60 times less in 1 minute. 120/60 = 2. So its velocity is 2 km per minute. OK?

b) 2 km per minute, so how many minutes for 960 km? Well, that's easy. 960/2 = 480. It will take 480 minutes for these 960 km.

c) how many hours are 480 minutes ? 480/60 = 8. This means the train will do those 960 km in 8 hours. If you want to verify, let's do the reverse calculation : 8 hours at 120 km/h : 8x120 = 960. Ohhh… yes, it's correct. See? It wasn't that complicated…

Step-by-step explanation:

pls thsnk