Level:
Project ID:
1003047804
Accepted:
1
Clonable:
0
Easy:
0
The pianist wanted to learn a new composition in $3$ weeks ($21$ days). He decided to learn the same number of bars (measures) a day. In the end, however, he met his plan only on the first day. Every other day, he managed to learn by one bar fewer than the previous day. Find how many bars did he learn on the $15$th day knowing that he was able to learn a total of $462$ measures (in $21$ days).
$18$
$22$
$32$
$15$
$20$