Runner A completes m in his first lap and increases each subsequent lap length by m

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

Runner A completes

400

m in his first lap and increases each subsequent lap length by

5

m. Runner B completes

380

m in his first lap and increases each subsequent lap length by

7

m. After how many laps will both runners cover the same distance in that lap? (a)

10

(b)

21

(c)

11

(d)

9