Solution:
Length = 9 mBreadth = 40cm = 0.4 m
Height = 20 cm = 0.2 m
Volume of beam = 9 × 0.4 × 0.2
= 0.72 m3
Now, weight of beam = 0.72 × 50
= 36 kg
Option C is correct
MathematicsA beam of 9 m long, 40 cm wide and 20 cm high is made up of iron which weight 50 kg per cubic metre. The weight of beam is :Class: 9
A beam of 9 m long, 40 cm wide and 20 cm high is made up of iron which weight 50 kg per cubic metre. The weight of beam is :
Class: 9
Breadth = 40cm = 0.4 m
Height = 20 cm = 0.2 m
Volume of beam = 9 × 0.4 × 0.2
= 0.72 m3
Now, weight of beam = 0.72 × 50
= 36 kg
Option C is correct
