What is The Total Amount of Wage He Receives After 40 Days?
Answer: (2) Rs. 820
If a worker in a factory receives one rupee on the first day and from the second day on words his wage is increased by one rupee everyday.
Then, The total mount of wage he receives after 40 days = 40 (40 + 1)/2
= 20 x 41
= Rs. 820
Hence, the answer is (2) Rs. 820.