Seiko Rotary Slide Rule Manual - Page 16

consumption

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[Solution] (1) Bring 35 on the bezel ruler and the time index (60 MPH) on the dial ruler in line. (2) Read the value on the bezel ruler scale which corresponds to the value 30 (5:00) on the dial ruler scale. The number is 17.5. (3) For the purpose of determining the correct number of digits, the same rule as for division (2-1(B)) applies. Thus, the correct value is 175. [Answer] 175 gallons C. Calculation of the time remaining for cruising [Problem] Time available for cruising Fuel innage Fuel consumption rate 175 gallons 35 gallons/hour [Solution] (1) Bring 35 on the bezel ruler and the time index (60 MPH) on the dial ruler in line. (2) Read the value on the dial ruler scale that corresponds to 17.5 on the bezel ruler scale. The number is 30 (5:00). 16

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[Solution]
(1)
Bring
35
on
the
bezel
ruler
and
the
time
index
(60
MPH)
on
the
dial
ruler
in
line.
(2)
Read
the
value
on
the
bezel
ruler
scale
which
corresponds
to
the
value
30
(5:00)
on
the
dial
ruler
scale.
The
number
is
17.5.
(3)
For
the
purpose
of
determining
the
correct
number
of
digits,
the
same
rule
as
for
division
(2-1(B))
applies.
Thus,
the
correct
value
is
175.
[Answer]
175
gallons
C.
Calculation
of
the
time
remaining
for
cruising
[Problem]
Time
available
for
cruising
Fuel
innage
175
gallons
Fuel
consumption
rate
35
gallons/hour
[Solution]
(1)
Bring
35
on
the
bezel
ruler
and
the
time
index
(60
MPH)
on
the
dial
ruler
in
line.
(2)
Read
the
value
on
the
dial
ruler
scale
that
corresponds
to
17.5
on
the
bezel
ruler
scale.
The
number
is
30
(5:00).
16