Asynthesis differs from a summary because it
shows connections
repeats the key points
introduces new ideas
paraphrases information

It shows connections

Explanation:

15:- 10cm

16:- 169cm

17:- 26 cm^3

Step-by-step explanation:

15)Original length of steel stock was 2.1m = 210cm

A piece of 8.6 dm(86cm) & 81cm and 330mm(33cm)

{coversion:1m=100cm,1dm=10cm,1mm=0.1cm]

remaining piece length equal to: 210cm-(86cm+81cm+33cm)

=(210- 200)cm=10cm

16)• 42 stall in 70.98m span(7098cm)

• 1stall is in (7098/42)cm span

i.e, 169 cm

17) area of the board in square centimeter is

40mm×65mm

=4cm×6.5cm

=26 cm^2