3722 w
67%
The table shows the travelling time to work of 50 people.
Frequency
Travelling time (1)
in minutes
0 5
10 15
20 13
30 < t < 40
10
40 < t < 50
7
Calculate an estimate of the mean travelling time.

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle