# IGCSE Mathematics Paper-1: Specimen Questions with Answers 9 - 12 of 324

## Question 9

### Write in Short

Short Answer▾

A United Kingdom Coin is a cylinder with a diameter of 38.61 millimeters and a thickness of 2.89 millimeters. Calculate, in cubic millimeters, the volume of the coin.

[The volume of a cylinder, radius r, height h, is .] A United Kingdom £ 5 Coin

### Explanation

Here, coin is having the shape like a cylinder with a diameter of 38.61 millimeters and a thickness of 2.89 millimeters.

We need to find the volume of the coin, so formula of a cylinder: , which is given,

Where

So, volume of coin =

## Question 10

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Short Answer▾

Solve as a single fraction.

Here,

## Question 11

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### Write in Short

Short Answer▾

Harsh՚s height is 185 cm, to the nearest centimeter. Complete the statement about the limits of his height.

### Explanation

Here, He is greater than or equal to 184.5 centimeters but less than 185.5 centimeters.

In mathematical form:

## Question 12

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### Write in Short

Short Answer▾

The River Nile is 6700 kilometers long in nearest hundred kilometers. What can be said about the length, L kilometers, of the River Nile.

### Explanation

Here, The River Nile is 6700 kilometers long.

• So, nearest hundred kilometers can be 6600 km and 6800 km.
• So, the statement about the length can be: