DeaPutri19
11. TQ = ST * OP +OT * SR /ST+OT = 3 cm *25 cm + 5 cm * 9 cm / 3cm + 5 cm = 75 + 45 / 8 cm = 120 /8 = 15 cm (b ) 13. = 5/12 * 10/x = 5x = 120 = x = 120 /5 = x = 24 cm ( a) 14.panjang karton = x panjang foto = 42 cm lebar karton = 28 +( 6 cm + 6 cm ) = 28 + 12 = 40 cm lebar foto = 28 cm jadii = panjang karton / panjang foto = lebar karton / lebar foto = x / 42 cm = 40 cm / 28 cm = 28 x = 1680 = x = 1680 /28 = x = 60 cm jadi lebar karton bagian bawah foto = 60 cm - ( 6 + 42 cm ) = 60 cm - 50 cm = 10 cm ( b )
= 3 cm *25 cm + 5 cm * 9 cm / 3cm + 5 cm
= 75 + 45 / 8 cm
= 120 /8
= 15 cm (b )
13. = 5/12 * 10/x
= 5x = 120
= x = 120 /5
= x = 24 cm ( a)
14.panjang karton = x
panjang foto = 42 cm
lebar karton = 28 +( 6 cm + 6 cm )
= 28 + 12 = 40 cm
lebar foto = 28 cm
jadii = panjang karton / panjang foto = lebar karton / lebar foto
= x / 42 cm = 40 cm / 28 cm
= 28 x = 1680
= x = 1680 /28
= x = 60 cm
jadi lebar karton bagian bawah foto = 60 cm - ( 6 + 42 cm )
= 60 cm - 50 cm
= 10 cm ( b )