Answer: A) 49 kmph Explanation: Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec. [(25/2) x (18/5)] km/hr = 45 km/hr. Let the speed of the train be 'x' km/hr. Then, relative speed = (x - 4) km/hr. x - 4 = 45 => x = 49 km/hr.

Answer: A) Radio Detecting and Ranging Explanation:

Answer: B) Gasoline additive Explanation: Tetraethyl lead is a highly toxic compound used as a gasoline additive. Tetraethyl lead abbreviated as TEL, is an organo lead compound with the formula (CH3CH2)4Pb. It is a petro-fuel additive which in turn caused increased vehicle performance. This is also used as an antiknock agent in gasoline and jet fuels. Tetraethyl lead is absorbed rapidly by the skin, the lungs, and the gastrointestinal tract. It is converted to triethyl lead, which might be responsible for its toxicity.

Answer: C) Red algae Explanation: The floridian starch is reserve food materials in the red algae or the members of class Rhodophytae. It is a characteristic feature of this group.

Answer: C) 6 days Explanation: From the given data, 12 children 16 days work,One child’s one day work = 1/192. 8 adults 12 days work,One adult’s one day’s work = 1/96. Work done in 3 days = ((1/96) x 16 x 3) = 1/2 Remaining work = 1 – 1/2 = 1/2 (6 adults+ 4 children)’s 1 day’s work = 6/96 + 4/192 = 1/12 1/12 work is done by them in 1 day. 1/2 work is done by them in 12 x (1/2) = 6 days.

Answer: C) Cytoplasm Explanation: Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation.   Translation occurs in the cytoplasm whereas transcription occurs in the nucleus.

Here If you notice the difference, There is no question mark (?) at the end of the puzzle. In that case, "What" is the name of the 5th child.

Answer: C) 1 proton only Explanation: The nucleus of hydrogen consists of only a single proton. Its parts are a single negatively-charged electron that circles a single positively-charged nucleus of the hydrogen atom. The electron is bound to the nucleus by the Coulomb force.