Out of the four alternatives,choose the one which can be substituted for the given words/sentences and click the button corresponding to it. The process by means of which plants and animals breathe.
1). Respiration
2). Germination
3). Absorption
4). Transpiration
If α + β = 90° and α:β = 2:1, then the ratio of
cosα to cosβ is
1). $1:\sqrt{3}$
2). 1:3
3). $1:\sqrt{2}$
4). 1:2
The angle of elevation of the top of a pillar from the foot and the top of a building 20 m high, are 60° and 30° respectively. The height of the pillar is
1). 10 m
2). 10√3 m
3). 60 m
4). 30 m
A galvanometer can be converted to a voltmeter by connecting
1). a high resistance in parallel
2). a high resistance in series
3). a low resistance in series
4). a low resistance in parallel
An article marked at Rs. 540 is sold at Rs. 496.80 in an offseason offer. Then the rate of descount offered (in percent) is
1). 7
2). 7.5
3). 8
4). 10