A prism has as the base a right-angled triangle whose sides adjacent to the right angles are 10 cm and 12 cm long. The height of the prism is 20 cm. The density of the material of the prism is 6 gm/cubic cm. The weight of the prism is –



[ A ]    6.4 kg
[ B ]    7.2 kg right
[ C ]    3.4 kg
[ D ]    4.8 kg
Answer : Option B
Explanation :
ATQ,
The volume of prism n= $1\over2$x10x12)x20= 1200 cubic cm
So, the weight of prism
=$1200X6\over1000$= 7.2 kg

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