Q1451: The Kashaf-ul-Mahjub was written by?
Q1452: The ozone layer protects the earth from rays sent by the sun?
Q1453: How many times in a day are the hands of clock in straight line but opposite in direction?
Q1454: The ratio of the length of a rod and its shadow is 1: √3. The angle of elevation of the sun is _____?
Q1455: The angle of elevation of a ladder leaning against a wall 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is?
Q1456: The total sum of all sides of a closed surface is called?
Q1457: What is the name of a triangle with two sides of equal length?
Q1458: Nearest planet to the sun is/are _____?
Q1459: The energy stored in coal is _____?
Q1460: Second highest layer of Earth's atmosphere is _______?