A man has some hens and some cows. If the total number of heads of hens and cows together is 50 and the nunber of feet of hens and cows together is 142, then the number of cows is

If sinθ+ cosecθ=2, then the value of sin-7∅+cosec7∅ is

Length of three line segments isgiven. Is construction of a triangle possible with the segments in the given cases?

From an external point two tangents to a circle are drawn. The chord passing through the points of contact subtends an angle72° at the centre. The angle between the tangents is?

If x+3y=-3x+y, then x22y2 is equal to

If a2+1=a, then the value of a3 is

A train 240 meters in length crosses a telegraph post in 16 seconds. The speed of the train is?

In a Village panchayat society 574 names are enlisted as 'below poverty level'. If 14% of the villagers are below poverty level, the total number of villagers is?