A student saves Tk. $10$ in week $1$ and increases the saving by Tk. $5$ each week. Total savings after $21$ weeks (Tk.)

Question

A student saves Tk. $10$ in week $1$ and increases the saving by Tk. $5$ each week. Total savings after $21$ weeks (Tk.) is —

Accepted Answer

$1260$

Answer

$1310$

Answer

$1290$

Answer

$1300$

A student saves Tk. 101010 in week 111 and increases the saving by Tk. 555 each week. Total savings after 212121 weeks (Tk.) is —