Question

The number of students in class 20 minutes
ago was 729. If the number of students
joining the class triples every 10 minutes,
what is the cube root of the number of
students joining after 40 minutes from now?​

Answer 1

Answer:

87,480

Step-by-step explanation:

first tripple 729 = 729 X 3 then multiply with 40 You can use calculator

Answer 2

Answer:

81

Step-by-step explanation:

For every 10 mins passage of time, the number of students joining the class gets tripled i.e.multiplied by 3

The number of students joining after 40 minutes from now on is 729×3×3×3×3×3×3 ( from 20 mins back to 40 mins forward)

The cube root of 729 is 9.

Cube root of given number is 9×3×3 = 81