# IGCSE Mathematics Paper-1: Specimen Questions with Answers 152 - 154 of 324

## Question 152

### Describe in Detail

Essay▾(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 153

### Write in Short

Short Answer▾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 =

## Question 154

### Describe in Detail

Essay▾Anita goes to a bank to change into riyals. The bank takes and then changes the remaining amount at a rate of riyals. How much does Anita receive in riyals?

### Explanation

Here, Anita goes to a bank to change into riyals.

The bank takes

So, now he has

Now, riyals.