If PQ and PR be the two tangents to a circle with centre O such that ∠QPR = 120° then ∠POQ is
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If xy+yz+zx = 1, then the value of (1+y2)(x+y)(y+z) ?
If x = at2 and y = 2at then
A train 110 metres long is running with a speed of 60 kmph . In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ?
By selling cloth at Rs. 9 per metre , a shopkeeper loses 10% . Find the rate at which it should be sold so as to earn profit of 15%
Two numbers whose sum is 84 can not be in the ratio
In a cyclic quadrilateral ABCD , the side AB is extended to a point X. If ∠XBC = 82° and ∠ADB = 47° , then the value of ∠BDC is
Which of the following sources has the largest share in power generation in India?