×
##### PPL Video Lectures (10 Jul 2020)

PPL Video Lectures covering Aerodynamics, General Knowledge, Performance, Meteorology And Navigation are now available through our website see front page for details.

× Welcome to the CPL Performance question and answer forum. Please feel free to post your questions but more importantly also suggest answers for your forum colleagues. Bob himself or one of the other tutors will get to your question as soon as we can.

## Progress Test 2 Topic 4 Questiin 10

• Posts: 110

### jukzizy created the topic: Progress Test 2 Topic 4 Questiin 10

Sir at the back of the book the answer for question 10 is 21.25..but for me I got 25.25 which is C is the correct for me..

see my working:

Time= Dis÷Speed
155÷103= 90 minutes

Flight fuel= fuel flow × Time
11.5 × 90= 17.25 Gallons

F/Fuel= 17.25
No Variable
Fixed Res- 4
Taxi- 0
Holding- 4

FOB @ Start up= 25.25 Gallons

Answer should be "C" but at the back of the book is "A"

Which one is correct?

• Posts: 454

### Stuart Tait replied the topic: Progress Test 2 Topic 4 Questiin 10

I think you must have an older book as that question has been updated that being said, your answer is correct

Cheers