25 men can complete a piece of work in 13 days. One man starts the work and after every day one more man joins the work and this continues till the work is completed. Then, in how many days will the work be completed?
Let 1 day work of 1 man = 1 units So total work = 25 ×13 = 325 units Suppose after n days work is finished. So, 1 + 2 + ………… +n = 325 ⇒ (n(n+1))/2 = 325 n² + n – 650 = 0 n² + 26n – 25n – 650 = 0 n(n + 26 ) – 25(n + 26) = 0 (n - 25) (n + 26) ∴ n = 25 Hence, the work will be finished in 25 days.
Which of the following statements is incorrect about the “Employee state insurance scheme”?
The speed of a bike increases by 4 km/hr after every 1 hour. If the distance travelled by the bike in 1 st hour is 30 km, the find the total distance tr...
Statement (I): Industrial relation is currently more influenced by the external market forces than the power play between employers and employees.
Which of the following statements is/are incorrect in regards Sharda Peeth Temple University?
Which is the correct chronology of the excavation of the site in the Indus civilization?
I. Mohenjo-Daro
II. Chanhudaro
III. Harapp...
Hakki Pikki is a tribe of the Indian subcontinent, they mostly live in which state?
The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 7:5:2, respectively. If ...
The RBI has signed a Currency Swap Agreement with the Maldives Monetary Authority (MMA); the SAARC Currency Swap Agreement came into operation in ______...
Which one of the following is not a correct statement?
With reference to the Election Commission which of the following statements is/are incorrect?
1. The Election Commission is a Permanent and In...
