Question
A boat covers 90 km downstream and 70 km upstream in a
total time of 10 hours. How much time will it take to travel 126 km downstream and 98 km upstream?Solution
Let speed of boat in downstream and upstream be ‘x’ km/h and ‘y’ km/h respectively.
So, 90/x + 70/y = 10
And, 126/x + 98/y = 1.40 × (90/x + 70/y) = 1.4 × 10 = 14 hours
Select the word with the correct spelling.Â
The researchers from Duke University in the US developed the prototype based on odour recaptors grown from the genes of mice that respond to target odours.
Select the INCORRECTLY spelt word.
Select the appropriate answer.
Choose the word with the correct spelling.
In each group, one word is correctly spelt. Find the correct word.
Choose the correctly spelt word?
In each of the questions below, a sentence is given with four words highlighted in bold in the sentence. Among these bold words, one may be wrongly spe...
 In the sentence, four highlighted words are given. One of these words may be misspelt or inappropriate in the context of the sentence. Find out the w...
Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word and click the button corresponding to it.
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