The rectangular top of a small box has dimensions of 140 mm by 230 mm. How long (in centimeters) would a ribbon need to be to go all the way around the edge of the top of the box?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.