Question

a boy run 1 kilometre in 12 minutes how long will be take to run 400m​

Answer 1

Answer:

1 km = 1000m

1000m = 12

400 m = x

by cross multiplying

1000x = 12 × 400

1000x = 12 × 400/1000

x = 12 ×4 /10

x=48/10

x= 4.8 mins

Step-by-step explanation:

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Answer 2

Distance = 1 km or 1000m

Time taken = 12minutes

time take to run 400m = 400 × 12/ 1000

= 4.8 min

= 4 min × 0.8× 60

= 4min 48 sec

Hence a boy take 4min 48 sec to run 400m