Answer
(a) $647504 m^{2}$
(b) $56.8×10^{-3} m^{3}$
(c) $58.9×10^{3} \frac{J}{sec}$
(d) 288.7 k
Work Step by Step
a) acre is a unit for measuring the area = $4046.9 m^{2}$ so
answer = $4046.9 m^{2}×160 = 647504 m^{2}$
(b) $1gal (U.S)=3.49×10^{-3} m^{3}$ so
answer = $3.49×10^{-3} m^{3}×15 = 56.8×10^{-3} m^{3}$
(c) $1 hp=745.7 \frac{J}{sec}$ so
answer = $745.7 \frac{J}{sec}×79.1 = 58.9×10^{3} \frac{J}{sec}$
(d) $1 F=1.8 k−459.4 $ so
answer :$ 60.3=1.8 k−459.4 $ ......... k=288.7
