If length, breadth and height of a cuboid are 20cm, 15cm and 10cm respectively, then find : (a) Area of the base. (b) Surface area of its vertical faces. (c) Volume.
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Solution
l=20cm, b=15cm, h=10cm. (a) Area of base =lb =20×15 =300cm2. (b) Surface area of its vertical faces =2(lh+bh) =2(20×10+15×10) =2×350 =700cm2 (c) Volume =lbh =20×15×10 =300×10 =3000cm3.