Question:A beam `9` m long, `40` cm wide and `20` cm high is made up of iron which weighs `50` kg per cubic metre. The wight of the beam is : 

A `56 kg` 
B `48 kg` 
C `36 kg` 
D `27 kg` 

+ Answer
C 

+ Explanation
Volume `= (9 xx 40/100 xx 20/100) cu.m`

`= 18/25 cu.m`.

:. Wight` = (18/25 xx 50) kg`

`= 36 kg`.

+ Report

Irin Moni

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