A started a work such that he can complete the whole work in 30 hours. After working for 10 hours, he worked with the rate such that the whole work can be completed in 24 hours. In how many hours A can complete the whole work?
Let the total work = 120 units Efficiency of A when he can complete the whole work in 30 hours = 120/30 = 4 units/hour Efficiency of A when he can complete the whole work in 24 hours = 120/24 = 5 units/hour Amount of work done in 10 hours = 10 × 4 = 40 units Time taken to complete the remaining work = (120 – 40)/5 = 16 hours Therefore, total time taken = 16 + 10 = 26 hours
A lateral branch arising from the base of main stem and which is used for propagation of some fruit plants is
Which of the following is not included in green house gases?
Koelreuter carried out hybridization experiments in
Lateritic soil is rich in iron and aluminum oxides, which are responsible for its characteristic reddish-brown color. Base saturation in lateritic soil ...
Lichens, the pioneer organisms that initiate ecological succession are actually a symbiotic association of
Which type of water absorption relies on the osmotic gradient, with root cells actively participating in the process by spending metabolic energy?
The marginal product of a factor input initially rises with its employment level, but after reaching a certain level of employment, it starts falling. ...
Market in which currencies buy and sell and their prices settle on is called the
Napier X Bajra hybrid is a cross between:
Which closed nuclear plant was commissioned again in 2019?
