Question
A boat can travel 10 km more in downstream than that in
upstream, in 5 hours while the difference between the time taken by the same boat to travel 250 km and 126 km, in still water, is 4 hours. Find the approximate time taken by the boat to travel 233 km in downstream and 100 km in upstream.Solution
Let the speed of boat in still water and speed of stream be 'x' km/hr and 'y' km/hr, respectively. According to question; (250/x) - (126/x) = 4 Or, (124/x) = 4 So, x = 31 Now, 5 x (31 + y) = 5 x (31 - y) + 10 Or, 155 + 5y = 155 - 5y + 10 Or, 10y = 10 So, y = 1 So, downstream speed of the boat = (31 + 1) = 32 km/hr And, upstream speed of the boat = (31 - 1) = 30 km/hr Required time taken = (233/32) + (100/30) ~ (7 + 3) ~ 10 hours
Select the option figure that is embedded in the given figure (X) as its part (rotation is NOT allowed).
Select the correct mirror image of the given combination when the mirror is placed at MN as shown below.
In a certain code language, 'ACD' is coded as '12', and 'BEA' is coded as '10'. How will 'ECG' be coded in that language?
What should come in place of ? in the given series based on the English alphabetical order?
ICU, FAT, CYS, ZWR, ?
Kishore, Aashay, Swapan, Atul, Varun and Harshit are sitting around a round table facing the centre. Varun is sitting to the immediate right of Kishore,...
Which of the following terms will replace the question mark (?) in the given series?
IMHP, MPJQ, QSLR, UVNS, ?
Study the given diagram carefully and answer the question that follows. The numbers in different sections indicate the number of persons who have applie...
If FHNPKMEG means GOLF, then what does RTSUHJBDJL stand for?
A, B, C, D, E, F and G are sitting around a circular table, facing the centre. Only one person sits between F and C when counted from the left of C. B s...
Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
20* 4 * 10 * 5 * 15 = 93