By what fraction does the mass of a boy increase

Download now India's Best Exam Prepration App Class 8-9-10, JEE & NEET
Video Lectures	Live Sessions
Study Material	Tests
Previous Year Paper	Revision

Video Lectures

Live Sessions

Study Material

Tests

Previous Year Paper

Revision

Question:
By what fraction does the mass of a boy increase when he starts running at a speed of $12 \mathrm{~km} / \mathrm{h}$ ?

Solution: