The minimum charge of telephone call upto 175 calls is rs200 and each additional call is rs 1.if a man paid rs1988.8 with 10%tsc and 13%vat of his one month telephone bill find the number of extra call of the month.

The number of extra call of the month is

Step-by-step explanation:

Given charge of telephone up to calls is

And each additional call costs

Also, there are % TSC and   % VAT.

So, total tax is %

And total bill paid is

We need to find number of extra call of the month.

So, amount before paying the tax would be

% of

Also, minimum charge of telephone is

Amount after deduction minimum charge is

It is given each additional call costs

So, total number of extra calls are ≅

24

step-by-step explanation:

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign