Description : The average weight of x,y,z is 90kg. If the average weight of x and y be 80kg and that of y and z be 86kg. Find the weight of y A) 66kg B) 63kg C) 62kg D) 70kg
Last Answer : C) Let x ,y ams z represent their individual weights. Then, X + y + z = ( 90 * 3) = 270kg X+ y = 80 *2 = 160kg Y + z = 86 * 2 = 172kg Therefore y = (x + y) + ( y+z) – (x+y+z) = 160 + 172 – 270 Y= 62kg.
Description : There are two groups of a class consisting of 72 and 88 students respectively. If the average weight of 1st group is 80kg and the weight of 2nd group is 70kg. Find the average weight of whole class? A) 64kg B) 74.5kg C) 84.5kg D) 54kg
Last Answer : B) Total weight of (72 + 88) = (72*80) + (88 * 70)kg = (5760 + 6160)kg = 11,920kg Average weight of the whole class = 11920 / 160 = 74.5 kg
Description : There was a fat man. He was being chased by zombies. The only way to get away was to cross a rope bridge. The rope bridge could only carry 80kg and the man was 79kg. The fat man had 2 things he needed to carry. Each weighed 1kg. How was he going to get across? -Riddles
Last Answer : Juggle the 2 things while getting across.
Description : 20% oleum means that in 100 kg oleum, there are 20 kg of (A) SO3 and 80kg of H2SO4 (B) H2SO4 and 80kg of SO3 (C) SO3 for each 100 kg of H2SO4 (D) None of these
Last Answer : (A) SO3 and 80kg of H2SO4