Explanation

Explanation

We are given:

$$11a=1331

Now,
$1331 = 11 times 11 times 11$
$1331 = 11^3$

So,

$11^a = 11^3$

Therefore,

a = 3

Last updated 18-02-2026

Explanation

80000 cm³ = 80 liters

(1 liter = 1000 cm³)

Explanation

Let's say B's income is 100%.

Then, A's income is 60% (since it's 40% less than B's).

To find out how much percent B's income is more than A's income, we need to find the difference between their incomes and divide it by A's income, then multiply by 100:

((B's income - A's income) / A's income) * 100

= ((100 - 60) / 60) * 100

= (40 / 60) * 100

= 66.66%

So, B's income is 66.66% more than A's income.

Last verified on 04-02-2026

Explanation

B's 1 day work = 1/20

C's 1 day work = 1/30

(B+C)'s 1 day work = 1/20 + 1/30 = 1/12

(B+C)'s 2 days work = 2 × 1/12 = 1/6

Remaining work = 1 - 1/6 = 5/6

A's 1 day work = 1/18

Time taken by A to complete 5/6 work:

= (5/6) / (1/18)

= 5/6 × 18

= 15 days

Last verified on 04-02-2026

Explanation

Total work = 10 × 14 = 140 person-days

Days needed by 4 persons = 140 ÷ 4 = 35 days.

Last verified on 01-02-2026

Explanation

Speed = Distance ÷ Time

Truck speed = 47 ÷ 10 = 4.7 km/h

Car speed = 47 ÷ 8 = 5.875 km/h

Ratio of car to truck = 5.875 : 4.7 = 5:4

Last verified on 29-01-2026

Explanation

• Parallel lines are lines in a plane that never meet, no matter how far they are extended.
• The distance (spacing) between them remains constant along their entire length.

Last verified on 28-01-2026

Explanation

Area of square = side² → 256 = side² → side = √256 = 16 cm

Perimeter = 4 × side = 4 × 16 = 64 cm

Last verified on 28-01-2026

Explanation

3/4 + 2/3

= (3×3)/(4×3) + (2×4)/(3×4)

= 9/12 + 8/12

= 17/12

Last updated on 09-03-2026