Answer: A) 90% Explanation: Let length, breadth and height of the room be 7, 3, 1 unit respectively. Area of walls = 2(l+b)xh = 2(7+3)x1 = 20 sq. unit. Now, length, breadth and height of room will become 3.5, 6 and 2 respectively.  Area of walls = 2(l+b)xh = 2(3.5+6)x2 = 38 sq. unit.  % Increase in the area of walls = (38-20)x100/20 = 90%.

Answer: A) a sovereign, socialist, secular and democratic republic Explanation: The Preamble was adopted with the constitution in the constituent assembly.   The Preamble proclaims the solemn resolution of the people of India to constitute India into a 'Sovereign socialist secular democratic republic'.

Here the letter 'M' appears once in Minute and twice in a MoMent.

Answer: C) 40 Explanation: Let distance = x km and usual rate = y kmph.Then, x/y - x/(y+3) = 40/60 --> 2y (y+3) = 9x ----- (i)Also, x/(y-2) - x/y = 40/60 --> y(y-2) = 3x -------- (ii)On dividing (i) by (ii), we get: x = 40 km.

Answer: A) Help to solve Balance of Payment problems of member countries Explanation:

Answer: A) cruise Explanation: Cruise = a sea voyage for pleasure. All other words are related to ‘journey on land, sea with an aim’.

Answer: A) Rameshwaram Explanation: In India Coral Reefs can be found in Rameshwaram.   Coral reefs in India are one of the most ancient and dynamic ecosystems of India. The coral reefs not only provide a sanctuary to a myriad of marine life but also play a key role in protecting the coastline from erosion. Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. Coral reefs are built by colonies of tiny animals found in marine water that contain few nutrients.

Answer: B) 50 km Explanation: We know 60 min = 1 hrTotal northward Laxmi's distance = 20kmph x 1hr = 20 kmTotal southward Prasanna's distance = 30kmph x 1hr = 30 kmTotal distance between Prasanna and Laxmi is = 20 + 30 = 50 km.