Question
The ratio of the speed of boat in upstream to speed of
boat in downstream is 7:9. If the boat can cover a total of 70 km upstream and 144 km downstream in 13 hours, then find the time taken by the boat to cover 180 km in still water.Solution
Let speed of boat in upstream and downstream be ‘7x’ km/h and ‘9x’ km/h respectively. 70/7x + 144/9x = 13 10/x + 16/x = 13 26 = 13x x = 2 Speed of boat in still water = (7x + 9x)/2 = 8x = 8 × 2 = 16 km/h Desired time = 180/16 = 11.25 hours
Answer the following question based on the direction given below:
If 'A#B' means 'A is the father of B' 'A@B' means 'A is the brother of B' '...
If 'A + B' means that A is the brother of B, 'A X B' means that A is the daughter of B, 'A ÷ B' means that A is the father of B, then which of the fol...
In expression I @ P % K $ O @ G # N % F, how is P related to F’s sister?
If the expression ‘S&R @ Q * P, S % T * U and V # U’ are true, then how is V’s only niece related to the person married to P?
Answer the following question based on the direction given below. If ‘A#B’ means ‘A is father of B’ ‘A@B’ means ‘A is daughter of B’ ‘...
If expression ‘R % T $ S # U $ V’ is true, then how is wife of V related to T’s mother?Â
If G @ H & I % J @ L ^ K then how is J related to H?
'A # B' means 'A is the brother of B'. 'A @ B' means 'A is the daughter of B'. 'A & B' means 'A is the husband of B'. 'A % B' means 'A is the wife of B'...
'A + B' means 'A is the sister of B'. 'A - B' means 'A is the brother of B'. 'A X B' means 'A is the father of B'. 'A ÷ B' means 'A is the wife of B'. ...
If 'A@B' means 'A is father of B', 'A#B' means 'A is wife of B', 'A$B' means 'A is sister of B', 'A%B' means 'A is brother of B'. If 'R @ S $ T # V @ U ...
Relevant for Exams:
