Answer: A) 330/29 m/s Explanation: Second gun shot take 30 sec to reach rahul imples distance between two. given speed of sound = 330 m/s Now, distance = 330 m/s x 30 sec    Hence, speed of the bus = d/t = 330x30/(14x60 + 30) = 330/29 m/s.

Answer: C) 960 km Explanation: 60(x + 1) = 64x X = 15 60 x 16 = 960 km

Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.   Photosynthesis can be represented using a chemical equation.   The overall balanced equation is                 6CO2 +  6H2O   →Sunlight    C6H12O6   +   6O2Source of Carbon & Oxygen  + Source of Electrons & Hydrogen + Energy that drives Photosynthesis             ----> Sugar + Gas produced by splitting water.   Where  CO2 = carbon dioxide  H2O = waterC6H12O6 = glucose  O2 = oxygen.

Answer: A) if a > b Explanation: I.  (a - 3)(a - 4) = 0   => a = 3, 4   II.   (b - 2)(b - 1) = 0   => b = 1, 2   => a > b

Answer: B) Pakistan Explanation:

Answer: A) 2 lit Explanation: Quantity of fruit juice in the mixture = 70 - [70 x (10/100) ]= 63 litres.   After adding water, juice would form 87.5% of the mixture.   Hence, if quantity of mixture after adding x liters of water, [(87.5) /100 ]*x = 63 => x = 72    Hence 72 - 70 = 2 litres of water must be added.

Answer: D) 6 Explanation: Let us assume Amount be 100 Rs and we calculate in CI  First year 60% of 100 = 60 amount (100+60) is 160  Second year 60% of 160 = 96 amount (160+96) is 256  Third year 60% of 256 =153.6 amount (256+153.6) is 409.6  Here the Amount of 100 Rs is quadrapled in 3 years.  One year contains 2 half years  Three year has 6 half years.  Therefore,  It takes 6 half years.

Answer: A) Pila globosa - pearl Explanation: Pinctada vulgaris is a bivalve from which pearl is obtained.