Unitary Method Class 7 RS Aggarwal Exe-8B MCQs Goyal Brothers ICSE Maths Solutions. We provide step by step Solutions of lesson / Chapter-8 Unitary Method for ICSE Class-7 Foundation RS Aggarwal Mathematics of Goyal Brothers Prakashan to develop skill and confidence. Visit official Website **CISCE** for detail information about ICSE Board Class-7 Mathematics

## Unitary Method Class 7 RS Aggarwal Exe-8B MCQs Goyal Brothers ICSE Maths Solutions

Board | ICSE |

Publications | Goyal brothers Prakashan |

Subject | Maths |

Class | 7th |

Chapter-8 | Unitary Method |

Writer | RS Aggrawal |

Book Name | Foundation |

Topics | Solution of Exe-8B |

Academic Session | 2024 – 2025 |

**EXE-8B MCQs**

Unitary Method Class 7 RS Aggarwal Exe-8B **MULTIPLE CHOICE QUESTIONS **Goyal Brothers ICSE Maths Solutions.

#### Choose the correct option in each of the following :

**Question-1: If 15 men can level a ground in 60 days, in how many days can 36 men level the same ground?**

(a) 24 days (b) 25 days (c) 27 days (d) 30 days

**Solution: **15 men can level a ground in 60 days

1 men can level the ground in (60 * 15) days

so, 36 men can level it in (60 * 15) / 36 = 25 days

Hence, option (b) is correct.

**Question-2: If 150 m of cloth is required to prepare dresses for 42 women, then for how many women will 125 m of cloth be sufficient?**

(a) 30 (b) 32 (c) 35 (d) 36

**Solution: **150 m of cloth is required to prepare dresses for 42 women

1 m of cloth is required to prepare dresses for (42 / 150) women

so, 125 m of cloth is required to prepare dresses for (42 / 150) * 125 women = 35 women

Hence, option (c) is correct.

**Question-3: In a map, 1.5 cm represents 46.8 km. How much distance will be represented by 3.5 cm on the map?**

(a) 96.4 km (b) 98.5 km (c) 109.2 km (d) 113.6 km

**Solution:** 1.5 cm represents 46.8 km

1 cm represents (46.8 / 1.5) km

so, 3.5 cm represents (46.8 / 1.5) * 3.5 km = 109.2 km

Hence, option (c) is correct.

**Question-4: If a car can go 224 km in 20 liters of petrol, how far can it go in 32.5 liters of petrol?**

(a) 364 km (b) 414 km (c) 288 km (d) 298 km

**Solution: **in 20 liters of petrol car can go 224 km

in 1 liters of petrol car can go (224 / 20) km

so, in 32.5 liters of petrol car can go (224 / 20) * 32.5 km = 364 km

Hence, option (a) is correct option.

**Question-5: If 16 buffaloes eat as much as 28 cows, how many buffaloes eat as much as 91 cows?**

(a) 48 (b) 52 (c) 64 (d) 76

**Solution: **buffaloes eat as much as 28 cows = 16

buffaloes eat as much as 1 cow = (16 / 28)

buffaloes eat as much as 91 cows = (16 / 28) * 91 = 52 cows

Hence, option (b) is the correct option.

**MENTAL MATHS**

Unitary Method Class 7 RS Aggarwal Exe-8B Goyal Brothers ICSE Maths Solutions.

Question-1. Fill in the blanks :

**(i) If 6 pens cost Rs 69, then the cost of 16 pens is __________.**

**Solution:** 6 pens cost Rs 69

1 pen cost Rs (69 / 6)

so, 16 pens cost Rs (69 / 6) * 16 = Rs 184

Hence, 16 pens cost Rs 184.

**(ii) If 1 dozen eggs cost Rs 54, then a tray of 30 eggs will cost _________.**

**Solution: **1 dozen eggs = 12 eggs

12 egg cost Rs 54

1 egg cost Rs (54 / 12)

so 30 eggs cost Rs (54 / 12) * 30 = Rs 135

Hence, 30 eggs will cost Rs 135

**(iii) A worker is paid Rs 1610 as wages for 14 days. His wages for 30 days will be __________.**

**Solution: **for 14 days worker is paid Rs 1610

for 1 days worker is paid Rs (1610 / 14)

for 30 days worker is paid Rs (1610 / 14) * 30 = Rs 3450

Hence, his wages for 30 days will be Rs 3450.

**(iv) 25 boxes of 12 ice-cream cups each, cost Rs 10500. The cost of 15 boxes of 20 ice-cream cope each, will be ______.**

**Solution: **25 boxes of 12 ice-cream cups cost Rs 10500

1 box and 1 ice-cream costs Rs [10500 / (25 * 12)]

so, 15 boxes and 20 ice-cream cups cost Rs [10500 / (25 * 12)] * (15 * 20) = (10500 / 300) * 300 = Rs 10500

Hence, cost of 15 boxes and ice-cream cups each will be Rs 10500.

#### Question-2. Write true(T) or false(F):

**(i) 12 kg apples for Rs 2160 is a better buy than 15 kg apples for Rs 2850. __________**

Ans-(i) True. Reason: 12 kg apples for Rs 2160

1 kg apples for Rs (2160 / 12) = Rs 180

whereas, 15 kg apples for Rs 2850

1 kg apples for Rs (2850 / 15) = Rs 190

Hence,12 kg apples for Rs 2160 is a better buy than 15 kg apples for Rs 2850.

**(ii) If 7 men can finish a work in 84 days, then 12 men can finish the same work in 96 days. ___________**

Ans-(ii) False, Reason: 7 men can finish a work in 84 days

1 men can finish the work in (84 / 7) days

so, 12 men can finish the same work in (84 / 7) * 12 days = 24 days

Hence,12 men can finish the same work in 24 days.

**(iii) If 9 notebooks cost Rs 315, then the cost of 20 notebooks is Rs 700. _____**

Ans-(iii) True, Reason: 9 notebooks cost Rs 315

1 notebooks cost Rs (315 / 9)

so, 20 notebooks cost Rs (315 / 9) * 20 = Rs 700

Hence, 20 notebooks cost Rs 700.

**(iv) In an indirect proportion, a decrease in one quantity causes an increase in the other quantity. ____**

Ans-(iv) True, Reason: In an indirect proportion, the ratio of one kind of like terms is equal to the inverse ratio of second kind of like terms.

**— : End of Unitary Method Class 7 RS Aggarwal Exe-8B MCQs , Mental Maths Goyal Brothers ICSE Maths Solutions :–**

**Return to: – ICSE Class -7 RS Aggarwal Goyal Brothers Math Solutions**

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