Progressions

A contract on construction job specifies a penalty for delay in completion

A contract on construction job specifies a penalty for delay in completion of the work beyond a certain date is as follows: Rs. 200 for the first day, Rs. 250 for the second day, Rs. 300 for the third day, etc. The penalty for each succeeding day being 50 more than that of the preceding day. How much penalty should the contractor pay if he delays the work by 10 days?

1. Rs. 4950
2. Rs. 4250
3. Rs. 650
4. Rs. 3600

A sum of Rs.700 has to be used to give seven cash prizes

A sum of Rs.700 has to be used to give seven cash prizes to the students of a school for their overall academic performance. If each prize is Rs.20 less than its preceding prize, what is the least value of the prize?

1. Rs. 30
2. Rs. 40
3. Rs. 60
4. Rs. 80