Question

Kong took

15%15\%
15%
15, percent
fewer seconds than Nolan took to complete his multiplication timed test. Kong took
8585
85
85
seconds.
How many seconds did Nolan take?

Answer 1

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

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 -
`(15)/(100)` )

Or, x = y ×
`(100-15)/(100)`

Or, x = y ×
`(85)/(100)`

Now, Since x = 85 seconds

So, 85 = y ×
`(85)/(100)`

Or, y =
`(85* 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