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421.The area of a triangle is with base 4m and height 5m?
422.The area of a triangle will be when a = 1m, b = 2m, c = 3m, a, b, c being lengths of respective sides.
423.The area of largest triangle that can be inscribed in a semicircle of radius R cm is____?
424.The area of sector of a circle whose radius is 12 metro and whose angle at the center is 42° is?
425.The area of the base of a rectangular tank is 6500Sq.cm and the volume of water containing in it is 2-6 cubic meters. The depth of the water in the tank is
426.The area of the cardboard(in cm2) needed to make a box of size 25 cm * 15 cm * 8 cm will be____?
427.The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 24 years. Find the average age of the women?
428.The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all
429.The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest
430.The average of 10 numbers is 23. If each number is increased by 4, what will the new average?