NEW MIDDLE EAST INTERNATIONAL SCHOOL (Academic Year: 2021-2022) Name: Grade: 8 Sec: Subject: MATHEMATICS Topic: Mensuration Date: Worksheet: 4 1. The parallel sides of trapezium are 85mm and 63mm and its altitude is 36mm. Find the area of the trapezium. 2. The area of a trapezium is 804cm2 and the perpendicular distance between the two parallel sides is 24cm. If one of the two parallel sides is 38cm, find the other side. 3. The area of a rhombus is 240cm2 and one of its diagonals is 16 cm, find the length of other diagonal. 4. Find the height of a cuboid whose base area is 240cm2 and volume is 3600cm3 5. A Godown measures 100m X 50m X18m. How many wooden planks can be stored in the godown , if the volume of each wooden plank is 150 m3 ? 6. A cylindrical tank has a capacity of 6160 m3, find its depth, if the diameter of its base is 28m. Also calculate the cost of painting inside the curved surface at the rate of ₹5 per m2. 7. The area of a trapezium is 396m2 and the distance between the parallel sides is 12m, find the length of the parallel sides if they are in the ratio 5:6 8. Three cubes each of side 4cm are joined end to end, find the surface area of the resulting cuboid. 9. Find the surface area of a cube whose volume is 3375m2 10.The length, breadth and height of a rectangular solid are in the ratio of 5:4:2, if the total surface area is 1216m2. Find the length, breadth and height of the solid.