A man marks a weekly contribution into a fund. In the first week, he paid $180, in the second week, he paid $260 and in the third week and so on, he paid $340. How much would he have contributed in 16 weeks?

$5,200

Step-by-step explanation:

total weeks=16

weeks given three=16-3=13

for all the weeks remaining he paid $340

so we have,

13 times $340=$4,420

for total weeks=$180+$260+$340+$4,420=$5,200

no not all of them.

step-by-step explanation:

some of them have a square base.