Explanation

Area = Length x Width

680 = 20 x Width

Width = 34 ft

Fencing is required for 3 sides:

Fencing length = Width + Width + Length

= 34 + 34 + 20

= 88 ft

So, the correct answer is 88 ft.

Explanation

Original cost price = 100

Original selling price = 100 + 320% of 100 = 420

New cost price = 100 + 25% of 100 = 125

Since the selling price remains constant, the profit is:

Profit = Selling price - New cost price = 420 - 125 = 295

Percentage of selling price that is profit:

(295 / 420) * 100% ≈ 70%

So, the correct answer is 70%.

Explanation

Selling price = Rs. 9 per Kg (at a loss of 20%)

Cost price = 9 / (1 - 0.20) = 9 / 0.80 = Rs. 11.25 per Kg

To make a profit of 5%:

Selling price = 11.25 x 1.05 = Rs. 11.81 per Kg

So, the correct answer is 11.81.

Explanation

Let the S.P. be Rs. 100

Then C.P will be Rs. 25

Profit will be 75

Profit %=  75/25×100%

=300%

Explanation

To find the number of pieces, divide the total length by the length of each piece:

42.5 meters ÷ 0.85 meters = 50

So, the correct answer is 50.

Explanation

Since the candidate secured 60% marks, the number of questions he attempted and got correct (12) is 60% of the total questions.

So, 12 = 0.6x

x = 12 / 0.6

x = 20

Therefore, the correct answer is 20.

Explanation

The pattern in the series is:

+5 (5 to 10)

+3 (10 to 13)

x2 (13 to 26)

+3 (26 to 29)

x2 (29 to 58)

+3 (58 to 61)

x2 (61 to 122)

Therefore, the correct answer is 122.

Explanation

To find the distance by which A beats B, we need to calculate the distance covered by B in the extra 10 seconds taken by B.

Since B covers 1 km in 3 minutes 20 seconds, B's speed is 1 km / 200 seconds.

In 10 seconds, B covers 10/200 km = 50 meters.

So, A beats B by 50 meters.

Explanation

To find the answer, we can use the formula: (men1 * hours1) = (men2 * hours2)

(36 * 25) = (15 * x)

x = 60 hours

Explanation