Question
The speed of a boat in still water is 30 km/hr. If the
boat covers 240 km in upstream in 12 hours, then find the time taken by the boat to travel 140 km in downstream.Solution
Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 240/12 = 20 km/hr Or, 30 – y = 20 Or, y = 30 – 20 = 10 km/hr Therefore, downstream speed of the boat = 30 + 10 = 40 km/hr Required time taken = 140/40 = 3.5 hours
In a certain code language,
A + B means 'A is the brother of B'.
A - B means 'A is the father of B'.
A X B means 'A is the m...
'A@B' means 'A is the father of B'. 'A#B' means 'A is the sister of B'. 'A$B' means 'A is the brother of B'. 'A%B' means 'A is the wife of B'.
If...
- In the following expression: A ? B @ C $ D # E. What should come in the place of the question mark (?), to establish that A is the father of B?
If A # B means A is mother of B. A @ B means A is brother of B. A % B means A is sister of B. A $ B means A is father of B. In expression K # G $ L % I ...
Answer the following question based on the direction given below. If 'A#B' means 'A is father of B'. 'A@B' means 'A is brother of B'. 'A$B' means 'A is ...
If ‘P@Q’ means ‘P is the mother of Q’, ‘P$Q’ means ‘P is the husband of Q’, ‘P#Q’ means ‘P is the sister of Q’, ‘P*Q’ means...
In expression I @ P % K $ O @ G # N % F, how is P related to F’s sister?
Answer the following question based on the direction given below.
If 'A$B' means 'A is son of B'
'A%B' means 'A is daughter of B'
'...
‘R+S’ means ‘R is the daughter of S’. ‘R−S’ means ‘R is the husband of S’.‘R × S’ means ‘R is the brother of S’. If ‘T × V...
If ‘R @ S × T ÷ U × V’ is true then how is S related to V?
Relevant for Exams:
