An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?
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The diagonals of 2 squares M and N are in the ratio 2:1. The ratio of their areas is
If the radius (r) of a circle is increased by 'x' units, what is the number of units by which the circumstance of the circle is increased?
The square root of 27225 is
Who is the Deputy Chief Minister of Bihar as of February 2018?
If X + 2Y = 27 and X - 2Y = -1, find the value of Y.
Saturated Hydrocarbons are called
Two trains are moving in opposite directions with the same speed. If the length of each train is 144 metres and they cross each other in 9 seconds, then what is the speed (in km/hr) of each train?
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