Question

The value of a sewing machine depreciates at the rate of 10 % after every year. If at the end of 3 years, its value is Rs. 8748, then find its purchase price

Answer 1

10% of 40500 = 4050

value of machine after one year = 40500-4050 = 36450

again 10% of 36450 = 3645

therefore the value of machine after two years = 36450-3645=32805.

now let the value of machine b4 one year would

be x then

x-x*10/100=40500,

9x/10=40500

x= 45000

again, let the value of machine b4 two years would y

then,

y-y*10/100=45000

9y/10 = 45000

y = 50000

therefore the value of machine after two years and b4 two years are respectively,

32805 & 50000