# HCL Placement: Sample Questions 19 - 21 of 57

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## Question 19

## Question 20

### Question

MCQ▾A trader bought 10kg of apples for ₹ 405 out of which 1kg of apples was found to be rotten. If he wishes to make a profit of 10 % , at what rate should he sell the remaining apples per kg?

### Choices

Choice (4) | |
---|---|

a. | ₹ 45 |

b. | ₹ 50 |

c. | ₹ 51 |

d. | ₹ 49.50 |

### Answer

a.### Explanation

- Trader bought 10 kg of apples for ₹ 405.
- So, cost of one kg of apple is = 40.5
- Trader wants to make 10 % profit then he should sell the remaining apples at rate SP,
- SP =
- SP =
- SP = 44.55
- So, to make 10 % profit, trader should sell one kg of apple at ₹ 44 .

## Question 21

### Question

MCQ▾HCL prototyping machine can make 10 copies every 4 seconds. At this rate, how many copies can the machine make in 6 minutes?

### Choices

Choice (4) | |
---|---|

a. | 360 |

b. | 900 |

c. | 600 |

d. | 240 |

### Answer

b.### Explanation

- 1 minute = 60 seconds
- 6 minutes = seconds

= 360 seconds

- In 4 seconds HCL prototype machine can make 10 copies
- Then in 360 seconds HCL prototype machine makes x copies

- HCL prototype can make 900 copies in 6 minutes.