3. A lawnmower takes 750 complete revolutions to cut grass on a field. Calculate the area of the field if the diameter of the lawnmower is 84 cm and the length is 1 m.
2. Calculate the height of a cuboid which has a base area of 180 cm2 and volume is 900 cm3.
1. The parallel sides of a trapezium measure 12 cm and 20 cm. Calculate its area if the distance between the parallel lines is 15 cm.
3. In a certain school, there are 456 girls. Calculate the total number of students if 24% of the total students are boys.
2. A shopkeeper bought two phones for Rs. 8,000 each. After selling the phones, there was a loss of 4% on the 1st phone while a profit of 8% on the 2nd phone. Calculate the overall gain or loss per cent on the whole transaction.
1.If 72% of 25 students like maths, find out the number of students who do not like mathematics?
4. Find the value of x3 + y3 + z3 – 3xyz if x2 + y2 + z2 = 83 and x + y + z = 15
3. Calculate the perimeter of a rectangle whose area is 25x2 – 35x + 12.
2. Find the value of the polynomial 5x – 4x2 + 3 at x = 2 and x = –1
1.Compute the value of 9x2 + 4y2 if xy = 6 and 3x + 2y = 12.
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