(i)[3]
Find the distance she must run on day 1 to achieve this. Give your answer in km correct to $1$ decimal place.
(ii)[2]
Find the total distance she covers over the $21$ days.
Mathematics 9709 · AS & A Level · Series
Series — practice question
A runner preparing for a long-distance race intends to cover a greater distance each day for 21 days. On day 1, she will run $x$ km, and on each later day the distance will increase by $10\%$ of the previous day’s distance. On day 21, she will run $20$ km.