boring a well 60 m depth, the cost is
Rs.4/– for the first meter. The cost of each successive meter
increases by Rs.3/–. What is the cost of boring the entire well?
Pick one:
A) 5550  B) 5450  C) 5650  D) 5780  E) 5980
as it is increased by 3 rupees so   4+7+10+13........   first term a=4   difference=d=3 then   60th term=a+59d=181   total cost=n/2(a+l)=60/2(4+181)=5550   5550NSWER:5550
<result>A</result>
boring a well 60 m depth, the cost is
Rs.4/– for the first meter. The cost of each successive meter
increases by Rs.3/–. What is the cost of boring the entire well?