volume of cuboid "l=0.8dm;b=0.01dm;h=80mm
Answers
Step-by-step explanation:
Volume of a cuboid =(Length×Breadth×Height) cubic units
Total surface area =2(lb+bh+lh) sq units
Lateral surface area =[2(l+b)×h] sq units
(i) Length = 22 cm, breadth = 12 cm, height = 7.5 cm
Volume =(Length×Breadth×Height) = (22×12×7.5)=1980 cm3
Total surface area =2(lb+bh+lh)= 2[(22×12)+(22×7.5)+(12×7.5)]=2[264+165+90]=1038 cm2
Lateral surface area =[2(l+b)×h]=2(22+12)×7.5=510 cm2
(ii) Length = 15 m, breadth = 6 m, height = 9 dm = 0.9 m
Volume =(Length×Breadth×Height) = (15×6×0.9)=81 m3
Total surface area=2(lb+bh+lh) = 2[(15×6)+(15×0.9)+(6×0.9)]=2[90+13.5+5.4]=217.8 m2
Lateral surface area =[2(l+b)×h]=2(15+6)×0.9=37.8 m2
(iii) Length = 24 m, breadth = 25 cm = 0.25 m, height = 6 m
Volume =(Length×Breadth×Height) = (24×0.25×6)=36 m3
Total surface area=2(lb+bh+lh) = 2[(24×0.25)+(24×6)+(0.25×6)]=2[6+144+1.5]=303 m2
Lateral surface area =[2(l+b)×h]=2(24+0.25)×6=291 m2