Sum of 4 consecutive terms in ap is32 ratio of first n last term to the product of middle terms 7/15 find the numbers
Water in a canal 6m wide and 1.5m deep ,is flowing with a speed of 10km/h.how much area will it irrigate in 30 minutes if 8cm of standing water is needed
https://www.teachoo.com/2247/589/Ex-4.1--4---Prove-1.2.3---2.3.4---..---n(n---1)-(n---2)--n(n-1)/category/Ex-4.1/