Two twins sisters Sita and Geeta were standing back to back and suddenly they started running in opposite directions for 6 km each. Then they turned left and ran for another 4.5 km.
What is the distance (in kilometers) between the the two twins when they stop?
Choose the correct choice from the following choices
A) 12 B) 15 C) 18 D) 21 E) 24
The distance between them is the hypotenuse of a right angle triangle with sides 9 km and 12 km.   hypotenuse = sqrt(9^2 + 12^2) = 15   The answer is 15.
<result>B</result>
Two twins sisters Sita and Geeta were standing back to back and suddenly they started running in opposite directions for 6 km each. Then they turned left and ran for another 4.5 km.
What is the distance (in kilometers) between the the two twins when they stop?