Question

Please someone solve it. Reply only if you know the answer, Its serious​

Answer 1

Answer:

279.5

Step-by-step explanation:

first convert 30 min to hr that is o.5 hr

let original time be x

x+0.5

t=d/S

x+0.5=28000/100

x+0.5=280

x=2800-0.5

x=279.5