Answer:
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
