Question

Myanmar has the world’s largest captive elephant population. A common sight on a visit to the forests of Myanmar is of elephants walking in the timber forests. The elephants are guided by their Mahouts, as they drag the logs through the forest- often up and down incredibly steep and muddy ridges. They deposit the logs in a clearing in the forest. These logs are later loaded onto trucks and transported to different places. The logs are stacked, such that the first row has 40 logs and each row on top has 2 logs less than the row below. (i)What is the AP formed? a)40, 36,32… b) 40,38,36,…. C)1,3,5,… d) 2,4,6… (ii) in the above arrangement, how many logs will there be in the fifth row from the bottom? a)34 b) 32 c) 5 d) 10 (iii) if the first row has 30 logs instead of 40, what is the number of rows if the top row has 10 logs? a)16 b)11 c)40 d) 5 (iv) if an AP is defined by the formula an = 4 + 3n, find the 20th term of the progression. a)24 b) 20 c)56 d)64 (v) in the above progression in Q (iv), find the sum of the first 10 terms a)41 b)205 c)207 d) 17​

Answer 1

Step-by-step explanation:

it is an AB , such that a = 20 and b = -1