Answer: D) 280 Explanation: Here asked for the value of 28 tens => 28 x 10 = 280.

Answer: B) Thimphu Explanation:

Answer: B) Mass Explanation: Mass means the amount of matter in an object. Anything that has Mass and takes up Space is called Matter.   The Study of Matter and and how matter changes is called Chemistry.   Matter has some mass and occupies some space. Space occupied by an object is called its Volume.

Answer: C) P1V1 = P2V2 Explanation: Ideal Gas Law :: The Combined gas law or General Gas Equation is obtained by combining Boyle's Law, Charles' Law, and Gay-Lussac's Law. It shows the relationship between the pressure, volume, and temperature for a fixed mass (quantity) of gas: P1V1T1 = P2V2T2   Hence, the Boyle's law P1V1 = P2T2, relates to ideal gas equation.

Answer: B) production of ATP from the breakdown of glucose Explanation: The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation. Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration.   Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

Answer: C) Science Explanation:

Answer: B) Father & Daughter Explanation:

Answer: D) 10 days Explanation: Ratio of efficiencies of Priya and Sai is Sai : Priya = 160 : 100 = 8 : 5 Given Priya completes the work in 16 days Let number of days Sai completes the work be 'd' => 5×16 = 8×d d = 10 days. Therefore, number of days Sai completes the work is 10 days.