Which of the following statement(s) mean the same as — “The demand for cameras has fallen by 85% in the last decade”? Class 8

Which of the following statement(s) mean the same as — “The demand for cameras has fallen by 85% in the last decade”? Class 8

Question 1.

Which of the following statement(s) mean the same as — “The demand for cameras has fallen by 85% in the last decade”? Class 8

(i) The demand now is 85% of the demand a decade ago.

(ii) The demand a decade ago was 85% of the demand now.

(iii) The demand now is 15% of the demand a decade ago.

(iv) The demand a decade ago was 15% of the demand now.

(v) The demand a decade ago was 185% of the demand now.

(vi) The demand now is 185% of the demand a decade ago.

Solution:

(iii) The demand now is 15% of the demand a decade ago.

Question 2.

Bank of Wahapur offers an interest of 10% p.a. Compare how much one gets if they deposit ₹ 20,000 for a period of 2 years with compounding and without compounding annually. Class 8

Solution:

With compounding

Interest for 1st year = [latex]\frac{10}{100}[/latex] × 20000

= ₹ 2000.

So, principal after one year = ₹ 22000

Now, interest for the second year

= [latex]\frac{10}{100}[/latex] × ₹ 22000

= ₹ 2200.

So, amount to be received after 2 years

= ₹ 22000 + ₹ 2200

= ₹ 24200.

Without compounding

Amount to be received

= ₹ 20000 (1 + 0.1 + 0.1)

= ₹ 20000 × 1.2

= ₹ 24000.