80 ice-creams
Let the number of icecream sold be x
then,
ATQ,
55x = $165
x = $165/55
x = $3
No. of icecream to be sold in order to earn $240 = $240/$3
No. of icecream to be sold in order to earn $240 = 80
Hence,80 ice-creams need to be sold to earn a total amount of $240