Question
A man takes 2.2 times as long to row a distance upstream
as to row the same distance downstream. If he can row 55 km downstream in 2 hours 30 minutes, what is the speed of the boat in still water?ÂSolution
DownstreamUpstream Time-5:11=>2.2=22/10=11/5 Speed-  11:5 Let the Downstream Speed=11x and upstream speed =5x Now ATQ- 11x =55/2.5 X=2 Speed of boat in still water =(11x+5x)/2 =16x/2=8x =8×2=16km/h
Which reagent is used to distinguish between aldehydes and ketones?
The process of depositing a layer of any desired metal on another material by means of electricity is called:
Which of the following reactions represents the correct conversion of ethanol to ethanoic acid?
Which of the following statement regarding Rutherford nuclear model is NOT correct?
Which among the following form of coal contains the highest percentage of carbon content?
Air coolers are more suitable for –
NaCl has which kind of bonds?
Which drug is used as an anti-inflammatory?
Which element is commonly used in nuclear reactors for producing electricity by nuclear fission?
The sparkling of a diamond is due to –
Relevant for Exams:
