# 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 cmB. 5.4 cmC. 7.2 cmD. 4.5 cm

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

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Basic Proportionality Theorem42 mins
A Peep into Pythagoras Theorem43 mins
Predominant Proof of Triangles52 mins
NCERT | Strong Your Basics of Triangles39 mins
RD Sharma | Imp. Qs From Triangles41 mins
Quiz | Criterion of Similarity of Triangle45 mins
How to Ace Maths in NTSE 2020?36 mins
R.D Sharma | Solve Exercise -4.2 and 4.345 mins
R.D Sharma | Solve Exercise-4.545 mins
NCERT | Basic Proportionality Theorem22 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses