The price of a scooter is increased by 10% this year. the present price is ru.40500. what was the last year's price?

100 - 10 = 90

So, last year's price was 10% cheaper so we know that last year's price was 90% of the value of this year's price:

0.90(40500) = 36450

Last year's price was Ru. 36450

Im thinking it was Ru.40500. I am not sure it is, but try it out!

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47