Answer: B) 1/6 Explanation: Total work is given by L.C.M of 72, 48, 36 Total work = 144 units Efficieny of A = 144/72 = 2 units/day Efficieny of B = 144/48 = 3 units/day Efficieny of C = 144/36 = 4 units/day   According to the given data, 2 x p/2 + 3 x p/2 + 2 x (p+6)/3 + 3 x (p+6)/3 + 4 x (p+6)/3 = 144 x (100 - 125/3) x 1/100 3p + 4.5p + 2p + 3p + 4p = 84 x 3 - 54 p = 198/16.5 p = 12 days.   Now, efficency of D = (144 x 125/3 x 1/100)/10 = 6 unit/day (C+D) in p days = (4 + 6) x 12 = 120 unit Remained part of work = (144-120)/144 = 1/6.

Answer: D) 12 p.m. Explanation: Assume both trains meet after 'p' hours after 7 a.m.Distance covered by train starting from A in 'p' hours = 20p kmDistance covered by train starting from B in (p-1) hours = 25(p-1)Total distance = 200=> 20x + 25(x-1) = 200=> 45x = 225=> p= 5Means, they meet after 5 hours after 7 am, ie, they meet at 12 p.m.

Answer: B) Voltage Explanation: Electrical Pressure is also called as Voltage. Voltage is measured in Volts.   Volt : A unit of electrical pressure or Voltage is called Volt.   One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.   Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.

Answer: D) Owl Explanation: An owl. "What noise does an owl make? The sound an Owl makes, it sounds like, "Who?" to our ears. They sounds entire lives asking the same question, but they'll never give any answers.

Answer: A) TRUE Explanation: The given statement about similar triangles is TRUE.   Similar Triangles Theorem :: Similar triangles are two triangles with corresponding angles of equal measure, and the ratios of their corresponding sides' lengths are equal.

Answer: A) 8400 Explanation: 12% of 70,000 => 12 x 70,000/100 => 8400   Hence, 12% of 70,000 = 8,400

Answer: A) Brass Explanation: Among the given options Brass is not a compound. Since it is an alloy, it is a mixture.    The smallest part of a compound is called a molecule. It has a unique composition that is always the same. Compound is a substance that consists of two or more elements.

Answer: C) Bailey Bridge Explanation: The Highest bridge in the world is Bailey bridge. It is located in the Ladakh valley between Dras and Suru rivers in the Himalayan mountains. It was built by the Indian Army in August 1982. It is 30 meters (98 ft) long and is at an altitude of 5,602 meters (18,379 ft) above sea level.