Diameter of the earth is 12756m in 1996 an new planet was discovered whose diameter is 5/86 of the diameter of the earth find the diameter of this planet in km

741.63 km

Corrected question:

Diameter of the earth is 12,756 km in 1996 an new planet was discovered whose diameter is 5/86 of the diameter of the earth find the diameter of this planet in km

Step-by-step explanation:

Let d1 and d2 represent the diameter of the earth and the new planet respectively.

Given:

Diameter of earth d1 = 12756 km

Diameter of new planet d2 = 5/86 of the diameter of earth

d2 = 5/86 * d1

Substituting the value of d1;

Diameter of new planet d2

d2 = 5/86 * 12756 km

d2 = 741.63 km

Diameter of new planet = 741.63 km