7, 8 ,9 question . Solve plz fast Share with your friends Share 0 Shruti Tyagi answered this Dear student, Question 8)Let the base and height of triangle be 7x and 5x respectively.Area of triangle=12×base×height⇒280=12×7x×5x⇒280×2=35x2⇒x2=56035⇒x2=16⇒x=4cmThus, the base of triangle =7x=7×4=28cmand the height of triangle =5x=5×4=20cm Question 9) We know by Heron's formulaArea of triangle=ss-as-bs-cwhere, s=a+b+c2Acc. to question,s=80+41+412=1622=81Area of triangle=ss-as-bs-c=8181-8081-4181-41=81×1×40×40=9×9×8×5×8×5=9×8×5=9×40=360 m2Cost of levelling per m2=Rs 12Cost of levelling 360m2=Rs 12×360=Rs 4320 Regards 1 View Full Answer Arnav Singh answered this 9th question u can use herons formuala to find out the area and then multiply the cost with the area. in the 8th question u have to make an equation using triangles are formula b x h. 1
