Question

a trader purchased an old bicycle for rupees 480. he spends 20% of the cost on its repair if he wants to earn rupees 144 as net profit on it how much percentage should hep add to the purchase price of the bicycle​

Answer 1

Answer:

50%

Cost price = Rs. 480

Repair cost =20% of Rs. 480 =

100

20

×480= Rs. 96

∴Total cost = C.P. + Repair cost

⇒ Rs. 480+ Rs. 96= Rs. 576

Net profit = Rs. 144

∴ S.P. = Total cost + Net profit

⇒ Rs. 576+ Rs. 144= Rs. 720

Profit = S.P. − C.P.

=720−480= Rs. 240

Now profit %= =

480

240

× 100=50%

Answer 2

The answer will be 50%

The C.P. of the bicycle - 480rs

trader spent 20% of the cost on repair of that bicycle - 20 × 480/100 - 96rs

NET cost price of bicycle - 480+96 - 576rs

He wanted to earn 144rs as profit so,

profit = SP - CP , SP = net profit + net CP ( 144 + 576 = 720)

*NOTE: The question is asking us the percentage that he should add to the purchase price (480rs) of the bicycle and NOT on the NET cost price (576rs) of the bicycle.

profit percent = SP - CP × 100 / C.P.

: 720 - 480 × 100 / 480 = 50%