Question

3. If the selling price of a commodity is tripled and the purchase price is doubled,then the profit is 65%. What percentage of the previous profit was? (1) 18% (2) 15% (3) 20% (4) 10%

Answer 1

Answer:

Step-by-step explanation:

Q:

If selling price is doubled, the profit triples. Find the profit percent ?

A) 100% B) 200%

C) 300% D) 400%

Answer:   A) 100%

Explanation:

Let the C.P be Rs.100 and S.P be Rs.x, Then

The profit is (x-100)

Now the S.P is doubled, then the new S.P is 2x

New profit is (2x-100)

Now as per the given condition;

=> 3(x-100) = 2x-100

By solving, we get

x = 200

Then the Profit percent = (200-100)/100 = 100

Hence the profit percentage is 100%

Answer 2

Answer:

10%. IND.

Step-by-step explanation:

let previous s.p = y & c.p = x

previous profit = y - x

new s.p = 3y & new c.p = 2x

new profit = 65%

2x + 65% of 2x = 3y

3.3x = 3y => y = 11x/10

previous profit = (11x/10) - x

= x /10

previous profit %

= x/10/ x * 100 = 10%

option (4) seems correct.