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1
If the quadratic equation has no real roots, then:
2
if the roots of the quadratic equations are real and equal , then:
3
An express train covers 240 km at a certain speed. Another train, whose speed is 12 km/hr less, takes an hour longer to cover the same distance. Find the speed of the express train in km/hr.
36
24
12
None of these
4
Find the nature of the roots of
:Roots are real and equal
Roots are imaginary or complex.
Roots are real and unequal
5
If the roots of the quadratic equation are real and distinct, then
6
A boat covers a certain distance downstream in 3 hours, and it covers the same distance upstream in 5 hours. If the speed of the boat in still water is 8 km/hr, then the speed of the stream is
1 km/hr
1.5 km/hr
2 km/hr
3 km/hr
7
The ship left the harbor and is travelling 60 kilometers downstream. Then it continues on the tributary river (upstream) 20 kilometers. Travel took 77 hours to finish. River speed is 11 km/h. Calculate the speed of a ship.
12km/hr
11km/hr
9km/hr
6km/hr
8
Two pipes running together can fill a cistern in minutes. If one pipe takes 3 minutes more than the other to fill it, find the time taken by each pipe to fill the cistern.
6min, 9 min
7 min, 10 min
5 min, 8 min
10 min, 13 min
9
A streamer goes downstream and cover the distance between two ports in 4 hours while it cover the same distance upstream in 5 hours. If the speed of the stream izs 2 km.per hour, then the speed of the streamer in still water is _____________
20km/hr.
19km/hr.
18km/hr.
19.5km/hr.
10
For what value of 'k', the equation + 2(k - 4) x + 2k = 0 has equal roots ?
8, 2
6, 4
12, 2
10, 4
11
On a journey of 100km, Meeta travels at a certain speed for the first 60km, and then increases his speed by 15km/h for the remainder. If the whole journey takes 2 hours, find his two speeds.
50km/hr, 65km/hr
35km/hr, 50km/hr
40km/hr, 55km/hr
45km/hr, 60km/hr
A car travels a distance of 180 km at a uniform speed. If the speed had been 10 km/hr less, it would have taken 3 hours more to cover the same distance. Find the speed of the car.
50
30
13
Two pipes running together can fill a cistern in minutes. If one pipe takes 1 minutes more than the other pipe to fill the cistern, then the time in which they alone can fill the cistern will be
2,3
5, 6
2,-3
14
The number of real roots of equation:=9 is:
15
Find the value of