Question
Ramesh and Rahman can do a work in 20 and 25 days
respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?Solution
Ramesh               Rahmaan 20                         25               100 5                           4 Total work =100 Work done by Ramesh and Rahman in 10 days = (5 + 4) x 10 = 90 Remaining work = 100-90 = 10 Let the efficiency of Suresh be x, then = 3x = 10 = x = 10/3 Suresh complete the whole work in = 100/(10/3) = 10 x 3 = 30 days
_______is used as a Water Purifier.
Which one of the following committee was constituted to review environmental laws in the country?
What was theme for World Hemophilia Day this year?
Which among the following is the only breeding ground for Indian Skimmer, an endangered fresh water bird species?
The process in which the branches of the tea bushes are cut off is
Cyclones Gulab was a tropical cyclone that caused considerable damage to ______ Asia.
The surface temperature of the Sun is nearly -
In a food chain, what is the difference between primary consumers and secondary consumers?
Which one of the following is world’s largest Start Up ecosystem ?
Which one of the following is an element of weather?
