Question
Speed of a boat in still water is 5times more than the
speed of stream. If boat covers 72 km in downstream in 6 hours, then find the time taken by the boat to cover 88 km in upstream.Solution
Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 5 × x = 5x km/hr Downstream speed of boat = 5x + x = 6x km/hr According to question; 6x = 72/6 = 12 Or, x = 2 Upstream speed of the boat = 5x – x = 4x = 4 × 2 = 8 km/hr Required time taken = 88/8 = 11 hours
Which cytoplasm is most commercially used in hybrid seed production of onion?
Match List-I with List-II and select the correct answer using the codes given below the lists.
Edible part of Saffron is ____
Kranz anatomy type photosynthesis is shown by
Blind hoeing is possible in:
Which one of the following is ICAR’s research repository for research management?
The yield of forest is regulated on the basis of volume by using following:
Physical dormancy caused by hard seed coat is overcome by
Which pest of sugarcane is characterized by the symptom of internodes becoming constricted and shortened with multiple boreholes and frass in the nodal ...
Foodgrains and oilseeds are dried to how much moisture level?
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