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 weight of the beam is Choose the correct choice from the following options.
A) 56 kg B) 36 kg C) 48 kg D) 27 kg E) None of these
Solution : weight = 18/25 *50= 
<gadget id="calculator">18/25 *50</gadget>
<output>36</output>
36 kg Answer 36 kg
<result>B</result>
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 weight of the beam is