Q. 275.0( 2 Votes )

ΔABC ~ ΔDEF and the perimeters of ΔABC and ΔDEF are 30 cm and 18 cm respectively. If BC = 9 cm then EF = ?
A. 6.3 cm

B. 5.4 cm

C. 7.2 cm

D. 4.5 cm

Answer :

Since the ABC DEF


Their sides will be same ratios. Let the ratio be K


= = = K………….1


AB + BC + AC = K (DE + EF + DF)


= K


1.67 = k


From…… 1


= 1.67


EF = 5.4 cm

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