The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?

Byadmin July 15, 2019August 3, 2021

The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?

A. Remains same
B. 5% decrease
C. 5% increase
D. 10% increase
Explanation:
100 * 100 = 10000
125 * 80 = 10000
No change

Mathematics Mcqs | Simplification and Approximation

(180/37 of 14.8) / (17/60.1 of 180.30) = _______?

(180/37 of 14.8) / (17/60.1 of 180.30) = _______?

A. 1.4
B. 1.6
C. 1.5
D. 1.2
Explanation:
(180/37 of 14.8) / (17/60.1 of 180.30) = 72/51 = 24/17 = 1.41

Read More (180/37 of 14.8) / (17/60.1 of 180.30) = _______?
Areas | Mathematics Mcqs

If the length and width of a rectangular grand are each increased by 20% then what would be the percent increase in the area of the garden?

If the length and width of a rectangular grand are each increased by 20% then what would be the percent increase in the area of the garden?

A. 20%
B. 24%
C. 36%
D. 44%

Let length = x metres and breadth = y metres , then area =(xy)m2
New length = 120/100x (6x/5)m
New breadth = 120/100 y = 6y/5m
New area (6x/5 x 6y/5)m2 = (36/25 xy)m2
Increase in area = (36/25xy – xy)m2 = (11/25 xy)m2
Increase % = (11/25 xy x 1/xy x 100)% = 44%

Read More If the length and width of a rectangular grand are each increased by 20% then what would be the percent increase in the area of the garden?
Mathematics Mcqs | Percentage Mcqs

The amount of water (in ml) that should be added to reduce 9 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is__________?

The amount of water (in ml) that should be added to reduce 9 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is__________?

A. 3
B. 4
C. 5
D. 6
Explanation:
4.5 4.5
30% 70%
30% —– 4.5
70% ——? => 10.5 – 4.5 = 6 ml

Read More The amount of water (in ml) that should be added to reduce 9 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is__________?
Compound Interest | Mathematics Mcqs

A man deposited Rs 6000 in a bank at 5% P.a simple interest another man deposits Rs 5000 at 8% P.a Compounded interest. After 2 years the difference of their interest will be_________?

A man deposited Rs 6000 in a bank at 5% P.a simple interest another man deposits Rs 5000 at 8% P.a Compounded interest. After 2 years the difference of their interest will be_________?

A. Rs 230
B. Rs 232
C. Rs 600
D. Rs 832
Explanation:
S.I = Rs (6000 × 5/100 × 2) = Rs 600
C.I = Rs [5000 × (1 + 8/100)2 – 5000]
= Rs (5000 × 27/25 × 27/25 – 5000)
= Rs(5832 – 5000)
= Rs 832
(C.I) – (S.I) = Rs (832 – 600) = Rs 232

Read More A man deposited Rs 6000 in a bank at 5% P.a simple interest another man deposits Rs 5000 at 8% P.a Compounded interest. After 2 years the difference of their interest will be_________?
Basic Maths Mcqs | Mathematics Mcqs | Percentage Mcqs

40 is subtracted from 60% of a number, the result is 50. Find the number?

40 is subtracted from 60% of a number, the result is 50. Find the number?

A. 150
B. 140
C. 130
D. 110
Explanation:
(60/100) * X – 40 = 50
6X = 900
X = 150

Read More 40 is subtracted from 60% of a number, the result is 50. Find the number?
Mathematics Mcqs | Simple Equations

In a three digit number, the hundred digit is 2 more than the tens digit and the units digit is 2 less than the tens digit. If the sum of the digits is 18, find the number?

In a three digit number, the hundred digit is 2 more than the tens digit and the units digit is 2 less than the tens digit. If the sum of the digits is 18, find the number?

A. 975
B. 753
C. 642
D. 684
E. None of these
Explanation:
Let the three digit numbers be 100a + 10b + c
a = b + 2
c = b – 2
a + b + c = 3b = 18 => b = 6
So a = 8 and b = 4
Hence the three digit number is: 864

Read More In a three digit number, the hundred digit is 2 more than the tens digit and the units digit is 2 less than the tens digit. If the sum of the digits is 18, find the number?

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