Question

A beam 9m long,40 cm wide and 20cm high is made up of iron which weighs 50 kg per cubic metre.the weight of the beam is what?

Answer 1

Answer:

area of beam=900*40*20=720000 cubic centimeter

                                          = 720 cubic meter

                50kg/cbm *720=  36000 kg

                                          =36  matric tons