Question

Kong took

Answer 1

Answer:

The time taken by Nolan to complete multiplication test is 100 seconds  .

Step-by-step explanation:

Given as :

The time by Kong to complete multiplication test = x = 85 seconds

The time by Kong to complete multiplication test = 15 % less than that of Nolan

Let The time taken by Nolan to complete multiplication test = y seconds

Now, According to question

∵The time by Kong to complete multiplication test = 15 % less than that of Nolan

So, The time by Kong to complete multiplication test =  time taken by Nolan - 15% of  time taken by Nolan

i.e x = y - 15 % of y

Or, x = y × (1 - $\dfrac{15}{100}$ )

Or, x = y × $\dfrac{100-15}{100}$

Or, x = y × $\dfrac{85}{100}$

Now, Since x = 85 seconds

So, 85 =  y × $\dfrac{85}{100}$

Or, y = $\frac{85\times 100}{85}$

i.e y = 100

So,The time taken by Nolan to complete multiplication test = y = 100 seconds

Hence,The time taken by Nolan to complete multiplication test is 100 seconds  . Answer