Question

the price of 1 litre petrol increased by 10%and then dicreaaed by 10%. if the price of the peteol wasRs. 100 then what is the new price of the petrol.​

Answer 1

Step-by-step explanation:

Let before increasing the price of petrol we are purchasing 1 litre petrol in 100 rs . So total quantity 100×1=100.

After increasing the price of petrol 10% let we are receiving x litre petrol. Then final quantity 110×x=100x

After equating initial and final quantity we will get the value of x.

100×1=110×x

Then x=10÷11

Initially we are getting 1 litre and after increment we are getting 10÷11

Reduction in amount of petrol 1-(10÷11)

That is 1÷11

1÷11×100

100÷11

Answer 2

Step-by-step explanation:

Let before increasing the price of petrol we are purchasing 1 litre petrol in 100 rs . So total quantity 100×1=100.

After increasing the price of petrol 10% let we are receiving x litre petrol. Then final quantity 110×x=100x

After equating initial and final quantity we will get the value of x.

100×1=110×x

Then x=10÷11

Initially we are getting 1 litre and after increment we are getting 10÷11

Reduction in amount of petrol 1-(10÷11)

That is 1÷11

1÷11×100

100÷11