Question 550378
Ratio of two fans = 16:23

multiply by common factor x
the prices will be 16x & 23x

AFTER TWO YEARS

first fan increaed by 10 % = 0.1*16x
price of the fan =16x+1.6x= 17.6x

increase in other fan = Rs. 477 

price = 23x+477

{{{17.6x/(23x+477)=11/20}}}

cross multiply
352x=11(23x+477)
352x=253x+5247

352x-253x=5247
99x=5247
x=53

Price of one fan = 53*16 =Rs. 848
price of second fan = Rs. 1219
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