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Explanation

Explanation

To find the answer, we calculate the total work:

42 women x 18 days = 756 woman-days

Since the work remains the same, we divide the total work by 21 days:

756 woman-days ÷ 21 days = 36 women

So, 36 women can do the same work in 21 days.

Explanation

The hands of a clock point in opposite directions (in the same straight line) 11 times in every 12 hours.

So, in a day, the hands point in the opposite directions 22 times.

Explanation

In this scenario, we can use the tangent function, which is the ratio of the opposite side (height of the tower, h) to the adjacent side (the horizontal distance, 70m):

Explanation

To find out what time Aftab Laghari leaves Gul Khan's house to reach the office, we need to add up the time it takes for each leg of the journey.

Aftab leaves his house at 20 minutes to seven, which is 6:40 AM.

Then, he reaches Gul Khan's house in another 15 minutes.

So, 6:40 AM + 15 minutes = 6:55 AM.

After spending some time at Gul Khan's house, Aftab leaves for the office, which takes another 35 minutes. Adding this to 6:55 AM:

6:55 AM + 35 minutes = 7:30 AM.

So, Aftab Laghari leaves Gul Khan's house at 7:30 AM to reach the office.

Explanation

Then, Ahmed's age after 15 years $=(x+15)$ years.
Ahmed age of 5 years back $=(x-5)$ years.
Given, $(x+15)=5(x-5)$
$x+15=5x-25$
$5x-x=15+25$
$4x=40$

Explanation

Let the required number of labourers be x

Less working hour/day, More labours (Indirect proportion)

More days, fewer labourers (Indirect proportion)

Explanation

To solve this, we can start by expressing the given ratio m:n = 3:2 in terms of a variable, let's say x. So, m = 3x and n = 2x.

Now, let's substitute these expressions into the given ratio (4m+5n):(4m-5n):

(4(3x) + 5(2x)) : (4(3x) - 5(2x))

Expanding and simplifying, we get:

(12x + 10x) : (12x - 10x)

22x : 2x

Now, we can divide both terms by 2x to get: 11 : 1

Explanation

LCM of 1/10 + 1/40 = 1/8

Number of days to complete the total work = 8 days

Explanation

1 km = 0.62137119 miles

0.62137119 miles ∼ 0.62 miles

∴ 1 km = 0.62 miles

Additional Information

Miles to Kilometres = Miles × 8/5 (Approximately)

Kilometers to Miles = Km × 5/8 (Approximately)