Start learning →

Parallel concentric squares have areas 900 and 1600 cm². Border width?

A10 cm
B20 cm
C5 cm
D15 cm
Answer & Solution
Correct answer: C. 5 cm
The sides are 30 and 40 centimetres, so the equal border occupies half their difference, or 5 centimetres.
Practise this question with Quill — ICSE Class 8 →

Keep practising Squares and Square Roots

Browse all Squares and Square Roots questions for ICSE Class 8, or explore more Mathematics topics.

Start a Squares and Square Roots lesson →
Related questions
How many perfect squares lie from 100 to 200, including endpoints?For prime p and positive integer n, p divides n². What must follow?Which pair of nonsquares has a perfect-square product?Smallest positive perfect square divisible by both 18 and 24?Compare √64 with √0.64. The first is how many times the second?For √2026, long division gives 45 with remainder 1. Thus?In square-root division of 12.25, how is the decimal part grouped?How many digits has the integer root of any four-digit perfect square?