AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

Mohit painted the outside of a box of length $2.5 m$ , breadth $2 m$ and height $1 m$ . How much area did he cover, if he painted all except the bottom of the box?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

20 m^{2}

16 m^{2}

54 m^{2}

14 m^{2}

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Given that, the dimensions of box are:
Length= 2.5m
Breadth =2m
Height= 1m
Question Image

The formula for the surface area of the cuboid having length, breadth and height as

l, b

and

h

respectively is given as

2 (lb + bh + hl)

.
So, after substituting the value of all the dimensions in the formula we get,
Then the area Mohit painted

\Rightarrow 2 (2.5 \times 2 + 2 \times 1 + 2.5 \times 1) - (2.5 \times 2)

\Rightarrow 2 (5 + 2 + 2.5) - (5)

\Rightarrow 2 (9.5) - 5

\Rightarrow 19 - 5

\Rightarrow 14 m^{2}

Therefore, the area covered is

14 m^{2}

, if he painted all except the bottom of the box.
Hence option (4) is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!