Question
Two person A and B from same distance with speed time
and same direction with speed of 48km/hr and 40km/hr .The speed of person B increased by ½ km every hr. after what time A and B will meet .Solution
Let the time be = t hrs , speed be= 48 km/hr , distance = 48× t Distance travelled by B forms an AP = 40, 40½, 41, 41½ , ………………………. t terms Where First term is 40 and Common difference is 1/2 Now, Sum of n terms = Sn = n/2 [2a + (n-1)d] = distance covered by A Sn = t/2 [2 × 40 + (t-1) 1/2] 48t= t/2 [2 × 40 + (t-1) 1/2] 96 = 80 + (t – 1) 1/2 16 = (t – 1) 1/2 33 = t Therefore A and B will meet after 33 hours
What should come in the place of question mark, in the given expressions to make ‘N ≤ T’ always true?
L > M = N ≤ O ≤ P _?_ Q = R ≤ S...
In which of the following expressions will the expression ‘ Q > B ’ be definitely true?
A statement is given, followed by four conclusions given in the options. Find out which conclusion is true based on the given statement.
Statemen...
In the question, assuming the given statements to be true, find which of the following conclusion(s) among the three conclusions is/are true and then g...
Statement: P < Q; V < S > T; V < U > Q
Conclusion: I. T ≥ P      II. P > T
Statements: C ≥ E > M ≤ Z < B; G ≥ Z > K
Conclusions:      I. C > K                 II. G ≥ B        ...
Statements: A > B > C; D < E < C; D ≥ F = G
Conclusion:
I. G < E
II. F < A
Statement: M > K ≥ V ≥ G; Q < T < M
Conclusion:
I. T < G
II. Q < V
Statements: W ≤ T = R; T < U < S; X = W ≥ Y
Conclusions:
I. S > Y
II. W ≥ S
III. U ≥ Y
Statements: M $ K; K & N, N % R, R @ W
Conclusions:Â Â Â Â Â
I. W & KÂ Â Â Â Â Â Â Â Â Â Â Â Â Â
II. K & W         �...
