Q1.
Stand against a wall and mark your height. Measure the distance between the floor and the marked point in feet and inches. Similarly, other students in the class can also measure their heights. Find out who is the tallest student in your class. What is his or her height in feet and inches?
Answer
Here is how to do it properly, and then a sample answer.
- Take off your shoes and stand with your back flat against the wall. Heels touching the wall, head straight, eyes looking forward.
- Ask a friend to lay a book flat on your head, touching the wall. Make a light pencil mark on the wall under the book.
- Step away. Measure from the floor up to the mark with a measuring tape.
- Read it in feet and inches if the tape has them, or read it in centimetres and change it: divide by 30 to get feet, and change what is left over into inches by dividing by 2 cm 5 mm.
- Write everyone's height in a class table. Then look for the biggest number — that is the tallest student.
Suppose your height is 130 cm.
130 ÷ 30 = 4, with 10 cm left over → 4 feet
10 cm = 100 mm; 100 ÷ 25 = 4 → 4 inches
So 130 cm is about 4 ft 4 in
130 ÷ 30 = 4, with 10 cm left over → 4 feet
10 cm = 100 mm; 100 ÷ 25 = 4 → 4 inches
So 130 cm is about 4 ft 4 in
Sample answer:
| Name | Height in cm | Height in feet and inches |
|---|---|---|
| Meera | 128 cm | about 4 ft 2 in |
| Arjun | 133 cm | about 4 ft 4 in |
| Fatima | 136 cm | about 4 ft 6 in |
| Ravi (tallest) | 142 cm | about 4 ft 8 in |
In this sample class the tallest student is Ravi, whose height is about 4 feet 8 inches.
Why the book on the head matters: If your friend just points at your head, the mark will be crooked and the height will be wrong by a centimetre or two. A flat book kept level gives the true top of your head.
Try this: Mark your height on the wall today and write the date beside it. Measure again after six months. How many centimetres did you grow?