Question

The pupils in my class work very quickly. Jasleen answers four questions every

30
seconds and Ella answers five questions every
40
seconds.

Last week, Jasleen took exactly
1
hour to answer a large set of questions.

How many minutes more than Jasleen did Ella take to answer the same set of questions?

Answer 1

4 mins more would be taken by Ellina

Explanation:

Given that

Jasleen answers 4 questions every 30 seconds

And, Ella answers 5 questions every 40 seconds

And, last week Jasleen took exactly 1 hour for answering a large set of questions

We need to find out the number of more minutes taken by Ella

As Jasleen answers four questions every 30 seconds

So, Jasleen answers 8 questions for every 1 minutes

Now

Jasleen answers time taken

= 60 × 8

= 480 questions for every 60 minutes or 1hr

On the other hand

Ella answers five questions every 40 seconds.

So, 1 questions in 8 sec

Now for 480 Questions , it would take

= 480 × 8 secs

= 480 × 8 ÷ 60 min

= 8 × 8

= 64 mins

Hence 4 mins more would be taken by Ellina