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Ishita trains for a race. She runs 3 km on the first day and increases her run by 400 m every following day.
What total distance does she cover in 25 days?

Class 10Sum of n Terms of an APAlgebra — Sequences
  • A200 km
  • B12.6 km
  • C390 km
  • D195 km

Step-by-Step Solution

Working in km: [6 + 24(0.4)] = km. The trap 200 km uses 25 instead of 24 in the bracket. 12.6 km is only , the distance on the last day alone. 390 km forgets the factor .
Answer: D) 195 km

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