Question
Speed of boat is 15 km/hr. Speed of the stream is 20%
less than speed of boat. Then find time taken by boat to go 108 km downstream?Solution
Speed of stream = 15 × (80/100) = 12 km/hr Time taken to go 108 km = 108/(15 + 12) = 4 hrs
Black cotton soil is best for cotton cultivation because of
Match the following oilseeds crops with their scientific name:
Who discovered Viroids?
Subsidy for green house is given under ___
Honey bees often sting
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Which of the following countries is the largest producer of millets in the world?Â
Nymphs of red cotton bug also damage ...............................................?
An exchange of genetic material between homologous chromosomes is called ...................?
1 acre is equal to?