Question

the cost of a car goes down every year by 15% of its previous value.find the original cost,if the cost of it after 2 years is rs.2,16,750.​

Answer 1

Answer:

the answer isif the original cost is X

then next year it cost 15% less

Y = X - 0.15X = 0.85X

here Y is cost after one year

now next year it cost 15% less

so Y - 0.15Y = 0.85Y

but we know after two years cost price is 2,16,750

so

0.85 Y = 2,16,750

But Y = 0.85 X

0.85*0.85*X = 2,16,750

X = 3,00,000

so original cost is Rs 3,00,000/-