# IGCSE Mathematics Paper-1: Specimen Questions with Answers 150 - 153 of 324

## Question number: 150

### Write in Short

Show the correlation on scatter diagram of application and its size in MB.

### Explanation

Here, applications can be of any size, so the correlation can be shown as below:

So, it shows the **Zero correlation** because it shows the no gradient.

## Question number: 151

### Write in Short

The scale on a map is 2: 300000. A road is 5.8 centimeters long on the map. Solve for the actual length of the road (in kilometers).

### Explanation

Here, meaning of 2: 300000 is 2 cm long road is magnified by 300000 times on the map.

- So, here 5.8 cm long road on the map can be
- Now, 100 cm = 1 m, so 174000 cm =?

- Now, 1000 m = 1 km, so 17400 m =?

- So, length of road is 17.4 kilometers.

## Question number: 152

### Describe in Detail

(a) Solve for volume of a cylinder of radius 50 cm and height 138 cm.

(b) Answer in cubic meters.

### Explanation

Here,

(a) Formula of Volume of Cylinder , where r = radius, h = height

So, here r = 50 cm and h = 138 cm.

So, Volume

(b) For answer in cubic meters:

So,

## Question number: 153

### Write in Short

On a journey a bus takes 35 minutes to travel the first 10 kilometers. It then travels a further 20 kilometers in the next 40 minutes.

- The bus started the journey at 18: 50. At what time did it complete the journey?
- Calculate the average speed of the whole journey in
(i) kilometers/minute,

(ii) kilometers/hour.

### Explanation

Here, bus takes 35 minutes to travel the first 10 kilometers then travels a further 20 kilometers in the next 40 minutes.

(a) Bus started the journey at 18: 50.

It takes total

So, it had completed the journey at 18: 50 + 1 hour + 15 minutes = 19: 50 + 15 minutes = 19: 50 + 10 minutes + 5 minutes = 20: 05.

(b) Here total distance =

Total time =

(i) Average speed =

(ii) 60 minutes = 1 hour

75 minutes =? hours

hours

So, average speed =