Others Maths Puzzle

The sum of the products of the root of a equation taken two at a time is 79. The product of its roots and sum of its roots are in the ratio 15:2, if sum of two of its roots equals the third root, find sum of its roots given that all are positive.

A.24
B.52
C.16
D.18

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Others Other Question

100 students are standing across a circular pound. If three students are to be selected who will swim in the pound such that there are at least 2 students between any two selected students. In how many ways this can be done?

(a) 142600
(b) 124600
(c) 162400
(d) none of these If a train starts journey from A to B, he meet an accident 80 km away from A after accident he rest there 30 min and then starts his journey with 4/5 of his previous speed and reached at B two hours late,, if he met accident 80 kmtrs further then train will late only one hour, Find actual velocity of train.