Question

A can do a piece of work in 24 days. B is 60% more efficient than A. The
numbers of days B takes to do the same piece of work is —
(a) 9.6
(6) 12
(c) 15
(d) 17
​

Answer 1

Answer:

the point moves by the distance

Δ

s

,

the tangent rotates by the angle

Δ

α

.

(The angle

α

is supposed to be increasing when rotating counterclockwise.)

The absolute value of the

Answer 2

$\huge{\underline{\underline {\mathtt{\purple{H}\pink{I}\:{M}\blue{A}\red{T}\orange{E}}}}}$

Question

A can do a piece of work in 24 days. B is 60% more efficient than A. The number of days B take to do the same piece of work is

a) 9.6

(6) 12

(c) 15

(d) 17

Answer:

$\Large\fbox\red{ Option\:(c)15\: Days}$

Solution

Let the work done by A be x so,

x = 24 days

As per the question , 60% of x = b

$x \times \frac{60}{100}$

$= \frac{3}{5} \times x$ = B's work

Now

If x = 24 days then,

$x\times \frac{3}{5} = \frac{24}{ x} \times x \times \frac{3}{5}$

$= \frac{72}{5} = 14.4$

Therefore, B can do the work in 14.4 days (or) 15days.

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