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Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 4 × x = 4x km/hr Downstream speed of boat = 4x + x = 5x km/hr According to question; 5x = 90/6 = 15 Or, x = 3 Upstream speed of the boat = 4x – x = 3x = 3 × 3 = 9 km/hr Required time taken = 63/9 = 7 hours
If air is called water, water is called green, green is called dust, dust is called yellow and yellow is called cloud, which of the following does fish ...
Punit, Qumar, Rohit, Sheetal, Tabir, and Umesh live in a multi-storeyed building. Qumar lives immediately below the floor where Umesh lives. Sheetal liv...
Select the number from among the given options that can replace the question mark (?) in the following series.
18, 27, 34, 39, 42, ?
Statement: Researcher Jiankui's claim that he has changed the human fetal genes has proved to be true.
Choose one of the following options
According to the given figure, each side of the dice is painted with purple, red red, yellow, blue, gray and orange. What color is painted in contrast t...
Choose the pair of words which are differently related from the rest:
Statement: H
conclusion:
i) M> I
ii) P>
iii) H
If A denotes ‘+’, B denotes ‘×’, C denotes ‘−’ and D denotes ‘÷’, then what will come in place of ‘?’ in the following equation...
If a mirror is placed on the shaded line, which of the following options is the correct reflection of the given shape?
