![Draw a line 7cm long and from each end point draw upright lines both 4cm high Draw a line joining the top ends of these lines Measure its length Draw a line 7cm long and from each end point draw upright lines both 4cm high Draw a line joining the top ends of these lines Measure its length](https://content-grail-production.s3.amazonaws.com/quetsion-media/c2f63444-a0a8-4241-8a77-826c560a5761-image.png)
Draw a line 7cm long and from each end point draw upright lines both 4cm high Draw a line joining the top ends of these lines Measure its length
![Hand Sewing Needles Large Eyes | Large Eye Embroidery Needles | Big Eye Sewing Needles - Sewing Needles - Aliexpress Hand Sewing Needles Large Eyes | Large Eye Embroidery Needles | Big Eye Sewing Needles - Sewing Needles - Aliexpress](https://ae01.alicdn.com/kf/HTB1bVdEPFXXXXaCXVXXq6xXFXXXL/20pcs-lot-big-eye-Needles-blunt-white-7cm-long-large-hole-NOT-sharp-sewing-kniting-embroidery.jpg)
Hand Sewing Needles Large Eyes | Large Eye Embroidery Needles | Big Eye Sewing Needles - Sewing Needles - Aliexpress
![The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases](https://d138zd1ktt9iqe.cloudfront.net/media/seo_landing_files/ncert-solutions-class-9-maths-chapter-13-exercise-13-4-question-4-01-1623733826.png)
The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases
![Realistic metal ruler 18 centimeters and metal ruler 7 inches. Pencil. Measuring tool. School supplies. Vector illustration Stock Vector Image & Art - Alamy Realistic metal ruler 18 centimeters and metal ruler 7 inches. Pencil. Measuring tool. School supplies. Vector illustration Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/RK870N/realistic-metal-ruler-18-centimeters-and-metal-ruler-7-inches-pencil-measuring-tool-school-supplies-vector-illustration-RK870N.jpg)