Q&A Forum
##### Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

Oct 19, 2013

# A solid iron rectangular block of dimensions 4.4 m, 2.6 m and 1 m

A solid iron rectangular block of dimensions 4.4 m, 2.6 m and 1 m is cast into a hollow cylindrical pipe of internal radius 30 cm and thickness 5 cm. Find the length of the pipe.

Agam Gupta

Member since Sep 21, 2013

Internal radius, r = 30 cm Thickness, w = 5 cm External radius, R = 30 + 5 = 35 cm Here volume of cuboid = volume of hollow cylinder 440 × 260 ×100 = π(R2 – r2)h ⇒ 440 × 260 × 100 = π(352 – 302)h ⇒ 440 × 260 × 100 = π(325)h ∴ h = 11200 cm = 112 m

Pranay Guda

Member since

Internal radius, r = 30 cm Thickness, w = 5 cm External radius, R = 30 + 5 = 35 cm Here volume of cuboid = volume of hollow cylinder 440 × 260 ×100 = π(R2  r2)h ⇒ 440 × 260 × 100 = π(352  302)h ⇒ 440 × 260 × 100 = π(325)h ∴ h = 11200 cm = 112 m

Kishore Kumar

Member since

Internal radius, r = 30 cm Thickness, w = 5 cm External radius, R = 30 + 5 = 35 cm Here volume of cuboid = volume of hollow cylinder  440 × 260 ×100 = π(R2 – r2)h ⇒ 440 × 260  × 100 = π(352 – 302)h ⇒ 440  × 260 × 100 = π(325)h ∴ h = 11200 cm = 112 m
###### Like NextGurukul? Also explore our advanced self-learning solution LearnNext
Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence
Explore
Animated Video
lessons
All India
Test Series
Interactive Video
Experiments
Best-in class
books