On a photograph of the Earth's moon,the Moon measures 30 cm in diameter and a small crater measures 0.2 cm.The Moon's physical diameter is 1738 km.What is the physical diameter of the small crater?
A)about 12 km
B)about 120 km
C)about 350 km
D)about 1738 km

Question

Quizplus · Accepted Answer

The scale of the photograph is 1738 km / 30 cm. Using this scale, the physical diameter of the crater is (0.2 cm * 1738 km) / 30 cm = 11.586 km, which is approximately 12 km.

On a Photograph of the Earth's Moon,the Moon Measures 30