Question

Of the given information, choose the jet with maximum speed.
Jet 1 : Covers 8 revolutions of the orbit of 11 mi in 2 h
Jet 2 : Covers 5 revolutions of the orbit of 9 mi in 1.25 h
Jet 3 : Covers 7 revolutions of the orbit of 10 mi in 1.5 h

• A. Jet 1
• B. Jet 2
• C. Jet 3

Answer 1

The correct option is C Jet 3

$\text{Speed =}\frac{\text{Total Distance}}{\text{Total Time}}$
Distance covered by Jet 1 = 8 x 11 mi
= 88 mi
Distance covered by Jet 2 = 5 x 9 mi
= 45 mi
Distance covered by Jet 3 = 7 x 10 mi
= 70 mi
$\therefore$ Speed of Jet 1 $=\frac{88}{2}=44\text{mph}$
Speed of Jet 2 $=\frac{45}{1.25}=36\text{mph}$
Speed of Jet 3 $=\frac{70}{1.5}=44.66\text{mph}$

Hence, speed of Jet 3 is highest.