A triangular prism has cross section ADE as shown. BC//DE, BC=4cm and DE-6cm. If the prism has a length of 10cm and density of 1.32g/cm3. Calculate the mass of the prism of cross-section ABC. Given that the area of trapezium BCDE=36cm2.
L.S.F =2/3A.S.F =4/9 s=36cm2 4×36 =28.8cm2 5Vol =28.8 ×10 =288cm3 1cm3 =1.32 288 × 1.32 =380.16g