Question

The outerrnost planet revolves round the sun in 27 weeks, the next one 9 weeks; and the innermost in 1 week. All three ortuts are in the same pline al plancts revolve in the same direction and the sun is in the centre of each orbit. What is the least number of weeks, which must ele befare the sun and the planets are in a straight line again?​

Answer 1

Answer:

At least 27 weeks must elapse before the sun and the planets are in a straight line again.

Step-by-step explanation:

(I am answering this question in short way.)

This question is of HCF and LCM.

Here, we have asked about least no. of weeks, thus, we have to find Least Common Multiple.

Hence, LCM of 27, 9 and 1 is 27 .

Thus, the final answer is 27 days.