Question

if the sum of length breadth and height of cuboidal box is 15cm and its lateral surface area is 56cm^2 find the length of longest pole which can fit in that box​

Answer 1

Step-by-step explanation:

=(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

Answer 2

Step-by-step explanation:

l+b+h=15cm. (given)

(BY DOING THE SQUARE OF BOTH THE SIDES )

(l+b+h)²=(15cm)²

l²+b²+h²+2lb+2bh+2hl=225cm²