Explanation

 Sir Creek is a tidal estuary, not a glacier, sea, or Iceland

It's a 96 km (60 mi) long water body 

 It is located on the border between India and Pakistan.

It's known for its fluctuating tides and is part of the Indus River Delta, where it flows into the Arabian Sea.

Explanation

Given:

1. Ten years ago, C's mother was 4 times as old as C:

10 years ago, C = 15 → mother = 4×15 = 60 → Now = 70

After 10 years, mother = 80 → 2×25 = 50

Explanation

The Black Hole of Calcutta incident happened in 1756 when British prisoners were allegedly confined in a small room by the troops of Nawab Siraj-ud-Daula.

This event was one of the factors that led to the Battle of Plassey in 1757, where Siraj-ud-Daula was defeated by the British.

Explanation

The mistress enquired of Fanny if she had mailed the two letters she gave her the day before.

The reporting verb "enquired" changes the direct speech into indirect speech.

The past tense verb "gave" and the time word "yesterday" correctly change to "the day before" in indirect speech.

Explanation

Total work = 16 men × 10 days = 160 man-days
Time for 8 men = $frac{160}{8}$ = 20 days

Explanation

Almost 40% of the world's oil supply passes through the Strait of Hormuz. 

  The Strait of Hormuz is 55 to 95 Km wide Strait.

It is located between the Persian Gulf and Oman Gulf.

Explanation

The opposite meaning of "stationary" (which means not moving or still) is "moving".

Explanation

"Cities" receives the action of the verb "polluting," so it is the direct object.

The structure is: Subject (Automobiles) + Verb (are polluting) + Object (cities).

Explanation

If a sum becomes 3 times in x years, and you're using compound interest, then:

• In 2x years, it becomes $3\times 3=9$ time

• In 3x years, it becomes $3\times 3\times 3=27$ time

So, if the sum triples in 4 years, it becomes 27 times in $4\times 3=12$ years.

Explanation

According to the Economist Intelligence Unit's Democracy Index, Norway is considered the world's first democracy. 

The Economist Intelligence Unit has published a Democracy Index since 2006, and consistently ranks Norway at the top.